diff --git a/openpdf-core/src/main/java/org/openpdf/text/pdf/PdfSignatureAppearance.java b/openpdf-core/src/main/java/org/openpdf/text/pdf/PdfSignatureAppearance.java
index 3c5a0aa37..607614e03 100644
--- a/openpdf-core/src/main/java/org/openpdf/text/pdf/PdfSignatureAppearance.java
+++ b/openpdf-core/src/main/java/org/openpdf/text/pdf/PdfSignatureAppearance.java
@@ -119,21 +119,50 @@ public class PdfSignatureAppearance {
     /**
      * Commands to draw a yellow question mark in a stream content
      */
-    public static final String questionMark = "% DSUnknown\n" + "q\n" + "1 G\n"
-            + "1 g\n" + "0.1 0 0 0.1 9 0 cm\n" + "0 J 0 j 4 M []0 d\n" + "1 i \n"
-            + "0 g\n" + "313 292 m\n" + "313 404 325 453 432 529 c\n"
-            + "478 561 504 597 504 645 c\n" + "504 736 440 760 391 760 c\n"
-            + "286 760 271 681 265 626 c\n" + "265 625 l\n" + "100 625 l\n"
-            + "100 828 253 898 381 898 c\n" + "451 898 679 878 679 650 c\n"
-            + "679 555 628 499 538 435 c\n" + "488 399 467 376 467 292 c\n"
-            + "313 292 l\n" + "h\n" + "308 214 170 -164 re\n" + "f\n" + "0.44 G\n"
-            + "1.2 w\n" + "1 1 0.4 rg\n" + "287 318 m\n"
-            + "287 430 299 479 406 555 c\n" + "451 587 478 623 478 671 c\n"
-            + "478 762 414 786 365 786 c\n" + "260 786 245 707 239 652 c\n"
-            + "239 651 l\n" + "74 651 l\n" + "74 854 227 924 355 924 c\n"
-            + "425 924 653 904 653 676 c\n" + "653 581 602 525 512 461 c\n"
-            + "462 425 441 402 441 318 c\n" + "287 318 l\n" + "h\n"
-            + "282 240 170 -164 re\n" + "B\n" + "Q\n";
+    public static final String questionMark = """
+            % DSUnknown
+            q
+            1 G
+            1 g
+            0.1 0 0 0.1 9 0 cm
+            0 J 0 j 4 M []0 d
+            1 i\s
+            0 g
+            313 292 m
+            313 404 325 453 432 529 c
+            478 561 504 597 504 645 c
+            504 736 440 760 391 760 c
+            286 760 271 681 265 626 c
+            265 625 l
+            100 625 l
+            100 828 253 898 381 898 c
+            451 898 679 878 679 650 c
+            679 555 628 499 538 435 c
+            488 399 467 376 467 292 c
+            313 292 l
+            h
+            308 214 170 -164 re
+            f
+            0.44 G
+            1.2 w
+            1 1 0.4 rg
+            287 318 m
+            287 430 299 479 406 555 c
+            451 587 478 623 478 671 c
+            478 762 414 786 365 786 c
+            260 786 245 707 239 652 c
+            239 651 l
+            74 651 l
+            74 854 227 924 355 924 c
+            425 924 653 904 653 676 c
+            653 581 602 525 512 461 c
+            462 425 441 402 441 318 c
+            287 318 l
+            h
+            282 240 170 -164 re
+            B
+            Q
+            """;
     private static final float TOP_SECTION = 0.3f;
     private static final float MARGIN = 2;
     private final PdfTemplate[] app = new PdfTemplate[5];
diff --git a/openpdf-core/src/main/java/org/openpdf/text/pdf/TrueTypeFontUnicode.java b/openpdf-core/src/main/java/org/openpdf/text/pdf/TrueTypeFontUnicode.java
index 665646de9..331075460 100644
--- a/openpdf-core/src/main/java/org/openpdf/text/pdf/TrueTypeFontUnicode.java
+++ b/openpdf-core/src/main/java/org/openpdf/text/pdf/TrueTypeFontUnicode.java
@@ -265,19 +265,21 @@ private PdfStream getToUnicode(int[][] metrics) {
             return null;
         }
         StringBuilder buf = new StringBuilder(
-                "/CIDInit /ProcSet findresource begin\n" +
-                        "12 dict begin\n" +
-                        "begincmap\n" +
-                        "/CIDSystemInfo\n" +
-                        "<< /Registry (TTX+0)\n" +
-                        "/Ordering (T42UV)\n" +
-                        "/Supplement 0\n" +
-                        ">> def\n" +
-                        "/CMapName /TTX+0 def\n" +
-                        "/CMapType 2 def\n" +
-                        "1 begincodespacerange\n" +
-                        "<0000><FFFF>\n" +
-                        "endcodespacerange\n");
+                """
+                        /CIDInit /ProcSet findresource begin
+                        12 dict begin
+                        begincmap
+                        /CIDSystemInfo
+                        << /Registry (TTX+0)
+                        /Ordering (T42UV)
+                        /Supplement 0
+                        >> def
+                        /CMapName /TTX+0 def
+                        /CMapType 2 def
+                        1 begincodespacerange
+                        <0000><FFFF>
+                        endcodespacerange
+                        """);
         int size = 0;
         for (int k = 0; k < metrics.length; ++k) {
             if (size == 0) {
@@ -295,10 +297,12 @@ private PdfStream getToUnicode(int[][] metrics) {
             buf.append(fromTo).append(fromTo).append(hexString).append('\n');
         }
         buf.append(
-                "endbfrange\n" +
-                        "endcmap\n" +
-                        "CMapName currentdict /CMap defineresource pop\n" +
-                        "end end\n");
+                """
+                        endbfrange
+                        endcmap
+                        CMapName currentdict /CMap defineresource pop
+                        end end
+                        """);
         String s = buf.toString();
         PdfStream stream = new PdfStream(PdfEncodings.convertToBytes(s, null));
         stream.flateCompress(compressionLevel);
diff --git a/openpdf-core/src/test/java/org/openpdf/text/pdf/LayoutProcessor534Test.java b/openpdf-core/src/test/java/org/openpdf/text/pdf/LayoutProcessor534Test.java
index fae819b81..6d3ee69c7 100644
--- a/openpdf-core/src/test/java/org/openpdf/text/pdf/LayoutProcessor534Test.java
+++ b/openpdf-core/src/test/java/org/openpdf/text/pdf/LayoutProcessor534Test.java
@@ -57,13 +57,14 @@ void whenLayoutRightToLeftLatinThenRevertCharOrder() throws IOException {
         PdfTextExtractor extractor = new PdfTextExtractor(new PdfReader(pdfOut.toByteArray()));
         String textFromPage = extractor.getTextFromPage(1);
         assertThat(textFromPage)
-                .isEqualTo("owTytnewt enOεytnewt ytnewt neetenin neethgie neetneves neetxis neetfif neetruof neetriht "
-                        + "evlewt nevele net enin thgie neves xis evif ruof eerht owt eno\n"
-                        + " evlewt nevele net enin thgie neves xis evif ruof eerht owt eno ytriht eniNytnewt thgiEytnewt "
-                        + "neveSytnewt xiSytnewt eviFytnewt ruoFytnewt eerhTytnewt\n"
-                        + " neveSytnewt xiSytnewt eviFytnewt ruoFytnewt eerhTytnewt owTytnewt enOεytnewt ytnewt neetenin n"
-                        + "eethgie neetneves neetxis neetfif neetruof neetriht\n"
-                        + " ytriht eniNytnewt thgiEytnewt");
+                .isEqualTo("""
+                        owTytnewt enOεytnewt ytnewt neetenin neethgie neetneves neetxis neetfif neetruof neetriht \
+                        evlewt nevele net enin thgie neves xis evif ruof eerht owt eno
+                         evlewt nevele net enin thgie neves xis evif ruof eerht owt eno ytriht eniNytnewt thgiEytnewt \
+                        neveSytnewt xiSytnewt eviFytnewt ruoFytnewt eerhTytnewt
+                         neveSytnewt xiSytnewt eviFytnewt ruoFytnewt eerhTytnewt owTytnewt enOεytnewt ytnewt neetenin n\
+                        eethgie neetneves neetxis neetfif neetruof neetriht
+                         ytriht eniNytnewt thgiEytnewt""");
     }
 
     @Test
@@ -90,14 +91,15 @@ void whenLayoutRightToLeftHebrewThenRevertCharOrder() throws IOException {
         // then
         byte[] pdfBytes = pdfOut.toByteArray();
         PdfTextExtractor extractor = new PdfTextExtractor(new PdfReader(pdfBytes));
-        String expected = ".ויה אלש םירבדה ןמ יושע ,דהדהמ ,לולח טקש היה וילאמ"
-                + " שקבתמה קלחה.םיקלח השולש תב הממד וז התיהו ,ךרדה־ןבא קדנופב הררש הממד .הליל תעש וז התיה בוש\n"
-                + " וליא .ויתס ילע תפרוג איהש יפכ ,ךרדה דרומב הממדהתא"
-                + " תפחוסו ויריצ לע הקירחב קדנופה טלש תא תלטלטמ ,םיצעה ןיב הרבועב תחנאנ התיה זאיכ ,חור התיה וליא\n"
-                + " וליא .תוכושחה הלילה תועשב,האבסמב םהל תופַצל"
-                + " םוקמ היהש ןואשבו הלומהב ,קוחצבו החישב הממדה תא םיאלממ ויה זאיכ ,םישנא ץמוק וליפא ,קדנופב להק היה\n"
-                + " .הניעב הממדה"
-                + " הרתונ ןכלו ,םש היה הלאה םירבדהמ דחא אלףא ,תמאה ןעמל .הקיסומ התיה אלש יאדו , אל לבא ...הקיסומ התיה";
+        String expected = """
+                .ויה אלש םירבדה ןמ יושע ,דהדהמ ,לולח טקש היה וילאמ\
+                 שקבתמה קלחה.םיקלח השולש תב הממד וז התיהו ,ךרדה־ןבא קדנופב הררש הממד .הליל תעש וז התיה בוש
+                 וליא .ויתס ילע תפרוג איהש יפכ ,ךרדה דרומב הממדהתא\
+                 תפחוסו ויריצ לע הקירחב קדנופה טלש תא תלטלטמ ,םיצעה ןיב הרבועב תחנאנ התיה זאיכ ,חור התיה וליא
+                 וליא .תוכושחה הלילה תועשב,האבסמב םהל תופַצל\
+                 םוקמ היהש ןואשבו הלומהב ,קוחצבו החישב הממדה תא םיאלממ ויה זאיכ ,םישנא ץמוק וליפא ,קדנופב להק היה
+                 .הניעב הממדה\
+                 הרתונ ןכלו ,םש היה הלאה םירבדהמ דחא אלףא ,תמאה ןעמל .הקיסומ התיה אלש יאדו , אל לבא ...הקיסומ התיה""";
         assertThat(extractor.getTextFromPage(1))
                 .isEqualTo(expected);
     }
diff --git a/openpdf-core/src/test/java/org/openpdf/text/pdf/encryption/DecryptAES256R6Test.java b/openpdf-core/src/test/java/org/openpdf/text/pdf/encryption/DecryptAES256R6Test.java
index 7e5f6e2c5..b81b662a8 100644
--- a/openpdf-core/src/test/java/org/openpdf/text/pdf/encryption/DecryptAES256R6Test.java
+++ b/openpdf-core/src/test/java/org/openpdf/text/pdf/encryption/DecryptAES256R6Test.java
@@ -492,10 +492,11 @@ void testReadIssue60102PaeoeaaUtf8() throws IOException {
             Assertions.assertTrue(isOwnerPasswordUsed(pdfReader), "PdfReader fails to report full permissions.");
             Assertions.assertEquals(10, pdfReader.getNumberOfPages(),
                     "PdfReader fails to report the correct number of pages");
-            Assertions.assertEquals("Sample PDF Document\n"
-                            + " Robert Maron\n"
-                            + " Grzegorz Grudzi´ nski\n"
-                            + " February 20, 1999", new PdfTextExtractor(pdfReader).getTextFromPage(1),
+            Assertions.assertEquals("""
+                            Sample PDF Document
+                             Robert Maron
+                             Grzegorz Grudzi´ nski
+                             February 20, 1999""", new PdfTextExtractor(pdfReader).getTextFromPage(1),
                     "Wrong text extracted from page 1");
             pdfReader.close();
         }
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/colors/Patterns.java b/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/colors/Patterns.java
index b7f0735c3..88574ae0a 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/colors/Patterns.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/colors/Patterns.java
@@ -71,18 +71,33 @@ public static void main(String[] args) {
             // step 6: put your drawing instruction in the painter canvas
 
             // A star pattern taken from Adobe PDF Reference Book p.207
-            String star = "0.3 g\n15.000 27.000 m\n"
-                    + "7.947 5.292 l\n26.413 18.708 l\n"
-                    + "3.587 18.708 l\n22.053 5.292 l\nf\n"
-                    + "45.000 57.000 m\n37.947 35.292 l\n"
-                    + "56.413 48.708 l\n33.587 48.708 l\n"
-                    + "52.053 35.292 l\nf\n"
-                    + "0.7 g\n15.000 57.000 m\n"
-                    + "7.947 35.292 l\n26.413 48.708 l\n"
-                    + "3.587 48.708 l\n22.053 35.292 l\nf\n"
-                    + "45.000 27.000 m\n37.947 5.292 l\n"
-                    + "56.413 18.708 l\n33.587 18.708 l\n"
-                    + "52.053 5.292 l\nf";
+            String star = """
+                    0.3 g
+                    15.000 27.000 m
+                    7.947 5.292 l
+                    26.413 18.708 l
+                    3.587 18.708 l
+                    22.053 5.292 l
+                    f
+                    45.000 57.000 m
+                    37.947 35.292 l
+                    56.413 48.708 l
+                    33.587 48.708 l
+                    52.053 35.292 l
+                    f
+                    0.7 g
+                    15.000 57.000 m
+                    7.947 35.292 l
+                    26.413 48.708 l
+                    3.587 48.708 l
+                    22.053 35.292 l
+                    f
+                    45.000 27.000 m
+                    37.947 5.292 l
+                    56.413 18.708 l
+                    33.587 18.708 l
+                    52.053 5.292 l
+                    f""";
 
             p.setLiteral(star);
 
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/graphics/Literal.java b/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/graphics/Literal.java
index a501b3e03..00e688f43 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/graphics/Literal.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/directcontent/graphics/Literal.java
@@ -50,18 +50,33 @@ public static void main(String[] args) {
 
             // step 4: we grab the ContentByte and do some stuff with it
             PdfContentByte cb = writer.getDirectContent();
-            String star = "0.3 g\n15.000 27.000 m\n"
-                    + "7.947 5.292 l\n26.413 18.708 l\n"
-                    + "3.587 18.708 l\n22.053 5.292 l\nf\n"
-                    + "45.000 57.000 m\n37.947 35.292 l\n"
-                    + "56.413 48.708 l\n33.587 48.708 l\n"
-                    + "52.053 35.292 l\nf\n"
-                    + "0.7 g\n15.000 57.000 m\n"
-                    + "7.947 35.292 l\n26.413 48.708 l\n"
-                    + "3.587 48.708 l\n22.053 35.292 l\nf\n"
-                    + "45.000 27.000 m\n37.947 5.292 l\n"
-                    + "56.413 18.708 l\n33.587 18.708 l\n"
-                    + "52.053 5.292 l\nf";
+            String star = """
+                    0.3 g
+                    15.000 27.000 m
+                    7.947 5.292 l
+                    26.413 18.708 l
+                    3.587 18.708 l
+                    22.053 5.292 l
+                    f
+                    45.000 57.000 m
+                    37.947 35.292 l
+                    56.413 48.708 l
+                    33.587 48.708 l
+                    52.053 35.292 l
+                    f
+                    0.7 g
+                    15.000 57.000 m
+                    7.947 35.292 l
+                    26.413 48.708 l
+                    3.587 48.708 l
+                    22.053 35.292 l
+                    f
+                    45.000 27.000 m
+                    37.947 5.292 l
+                    56.413 18.708 l
+                    33.587 18.708 l
+                    52.053 5.292 l
+                    f""";
             cb.setLiteral(star);
 
             // sanityCheck doesn't check literals.
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidi.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidi.java
index f587e37dd..3e21f7275 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidi.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidi.java
@@ -28,8 +28,11 @@
 public class GlyphLayoutDocumentBidi {
 
     public static String INTRO_TEXT =
-            "Test of bidirectional text\n" +
-                    "Using LayoutProcessor for glyph layout with Java built-in routines.\n\n";
+            """
+                    Test of bidirectional text
+                    Using LayoutProcessor for glyph layout with Java built-in routines.
+                    
+                    """;
 
     /**
      * Main method
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidiPerFont.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidiPerFont.java
index 60c088c2e..86cde492a 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidiPerFont.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentBidiPerFont.java
@@ -29,8 +29,11 @@
 public class GlyphLayoutDocumentBidiPerFont {
 
     public static String INTRO_TEXT =
-            "Test of bidirectional text\n" +
-                    "Using LayoutProcessor for glyph layout with Java built-in routines.\n\n";
+            """
+                    Test of bidirectional text
+                    Using LayoutProcessor for glyph layout with Java built-in routines.
+                    
+                    """;
 
     /**
      * Main method
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentDin91379.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentDin91379.java
index 2dd80e8b6..ce02e9898 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentDin91379.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentDin91379.java
@@ -26,76 +26,88 @@
 public class GlyphLayoutDocumentDin91379 {
 
     public static String TEXT_INTRO =
-            "Test of formatting for letters and sequences defined in:\n"
-                    + "DIN 91379:2022-08: Characters and defined character sequences in Unicode for the\n"
-                    + "electronic processing of names and data exchange in Europe, with CD-ROM.\n"
-                    + "See https://github.com/String-Latin/DIN-91379-Characters-and-Sequences\n"
-                    + "and https://en.wikipedia.org/wiki/DIN_91379\n\n"
-                    + "Fonts used: Noto Sans Regular, Noto Sans Math Regular, Noto Serif Regular\n"
-                    + "See https://fonts.google.com/noto/specimen/Noto+Sans\n"
-                    + "and https://github.com/googlefonts/noto-fonts/tree/main/hinted/ttf\n"
-                    + "Using LayoutProcessor for glyph layout with Java built-in routines.\n\n";
+            """
+                    Test of formatting for letters and sequences defined in:
+                    DIN 91379:2022-08: Characters and defined character sequences in Unicode for the
+                    electronic processing of names and data exchange in Europe, with CD-ROM.
+                    See https://github.com/String-Latin/DIN-91379-Characters-and-Sequences
+                    and https://en.wikipedia.org/wiki/DIN_91379
+                    
+                    Fonts used: Noto Sans Regular, Noto Sans Math Regular, Noto Serif Regular
+                    See https://fonts.google.com/noto/specimen/Noto+Sans
+                    and https://github.com/googlefonts/noto-fonts/tree/main/hinted/ttf
+                    Using LayoutProcessor for glyph layout with Java built-in routines.
+                    
+                    """;
 
     public static String LATIN_CHARS_DIN_91379 =
-            "bll; Latin Letters (normative)\n"
-                    + "A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \n"
-                    + "a b c d e f g h i j k l m n o p q r s t u v w x y z \n"
-                    + "À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö Ø Ù Ú \n"
-                    + "Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô \n"
-                    + "õ ö ø ù ú û ü ý þ ÿ Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď ď \n"
-                    + "Đ đ Ē ē Ĕ ĕ Ė ė Ę ę Ě ě Ĝ ĝ Ğ ğ Ġ ġ Ģ ģ Ĥ ĥ Ħ ħ Ĩ ĩ \n"
-                    + "Ī ī Ĭ ĭ Į į İ ı IJ ij Ĵ ĵ Ķ ķ ĸ Ĺ ĺ Ļ ļ Ľ ľ Ŀ ŀ Ł ł Ń \n"
-                    + "ń Ņ ņ Ň ň ʼn Ŋ ŋ Ō ō Ŏ ŏ Ő ő Œ œ Ŕ ŕ Ŗ ŗ Ř ř Ś ś Ŝ ŝ \n"
-                    + "Ş ş Š š Ţ ţ Ť ť Ŧ ŧ Ũ ũ Ū ū Ŭ ŭ Ů ů Ű ű Ų ų Ŵ ŵ Ŷ ŷ \n"
-                    + "Ÿ Ź ź Ż ż Ž ž Ƈ ƈ Ə Ɨ Ơ ơ Ư ư Ʒ Ǎ ǎ Ǐ ǐ Ǒ ǒ Ǔ ǔ Ǖ ǖ \n"
-                    + "Ǘ ǘ Ǚ ǚ Ǜ ǜ Ǟ ǟ Ǣ ǣ Ǥ ǥ Ǧ ǧ Ǩ ǩ Ǫ ǫ Ǭ ǭ Ǯ ǯ ǰ Ǵ ǵ Ǹ \n"
-                    + "ǹ Ǻ ǻ Ǽ ǽ Ǿ ǿ Ȓ ȓ Ș ș Ț ț Ȟ ȟ ȧ Ȩ ȩ Ȫ ȫ Ȭ ȭ Ȯ ȯ Ȱ ȱ \n"
-                    + "Ȳ ȳ ə ɨ ʒ Ḃ ḃ Ḇ ḇ Ḋ ḋ Ḍ ḍ Ḏ ḏ Ḑ ḑ ḗ Ḝ ḝ Ḟ ḟ Ḡ ḡ Ḣ ḣ \n"
-                    + "Ḥ ḥ Ḧ ḧ Ḩ ḩ Ḫ ḫ ḯ Ḱ ḱ Ḳ ḳ Ḵ ḵ Ḷ ḷ Ḻ ḻ Ṁ ṁ Ṃ ṃ Ṅ ṅ Ṇ \n"
-                    + "ṇ Ṉ ṉ Ṓ ṓ Ṕ ṕ Ṗ ṗ Ṙ ṙ Ṛ ṛ Ṟ ṟ Ṡ ṡ Ṣ ṣ Ṫ ṫ Ṭ ṭ Ṯ ṯ Ẁ \n"
-                    + "ẁ Ẃ ẃ Ẅ ẅ Ẇ ẇ Ẍ ẍ Ẏ ẏ Ẑ ẑ Ẓ ẓ Ẕ ẕ ẖ ẗ ẞ Ạ ạ Ả ả Ấ ấ \n"
-                    + "Ầ ầ Ẩ ẩ Ẫ ẫ Ậ ậ Ắ ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ặ ặ Ẹ ẹ Ẻ ẻ Ẽ ẽ Ế ế \n"
-                    + "Ề ề Ể ể Ễ ễ Ệ ệ Ỉ ỉ Ị ị Ọ ọ Ỏ ỏ Ố ố Ồ ồ Ổ ổ Ỗ ỗ Ộ ộ \n"
-                    + "Ớ ớ Ờ ờ Ở ở Ỡ ỡ Ợ ợ Ụ ụ Ủ ủ Ứ ứ Ừ ừ Ử ử Ữ ữ Ự ự Ỳ ỳ \n"
-                    + "Ỵ ỵ Ỷ ỷ Ỹ ỹ \n"
-                    + "Sequences\n"
-                    + "A̋ C̀ C̄ C̆ C̈ C̕ C̣ C̦ C̨̆ D̂ F̀ F̄ G̀ H̄ H̦ H̱ J́ J̌ K̀ K̂ K̄ K̇ K̕ K̛ K̦ K͟H \n"
-                    + "K͟h L̂ L̥ L̥̄ L̦ M̀ M̂ M̆ M̐ N̂ N̄ N̆ N̦ P̀ P̄ P̕ P̣ R̆ R̥ R̥̄ S̀ S̄ S̛̄ S̱ T̀ T̄ \n"
-                    + "T̈ T̕ T̛ U̇ Z̀ Z̄ Z̆ Z̈ Z̧ a̋ c̀ c̄ c̆ c̈ c̕ c̣ c̦ c̨̆ d̂ f̀ f̄ g̀ h̄ h̦ j́ k̀ \n"
-                    + "k̂ k̄ k̇ k̕ k̛ k̦ k͟h l̂ l̥ l̥̄ l̦ m̀ m̂ m̆ m̐ n̂ n̄ n̆ n̦ p̀ p̄ p̕ p̣ r̆ r̥ r̥̄ \n"
-                    + "s̀ s̄ s̛̄ s̱ t̀ t̄ t̕ t̛ u̇ z̀ z̄ z̆ z̈ z̧ Ç̆ Û̄ ç̆ û̄ ÿ́ Č̕ Č̣ č̕ č̣ ē̍ Ī́ ī́ \n"
-                    + "ō̍ Ž̦ Ž̧ ž̦ ž̧ Ḳ̄ ḳ̄ Ṣ̄ ṣ̄ Ṭ̄ ṭ̄ Ạ̈ ạ̈ Ọ̈ ọ̈ Ụ̄ Ụ̈ ụ̄ ụ̈ \n"
-                    + "bnlreq; Non-Letters N1 (normative)\n"
-                    + "  ' , - . ` ~ ¨ ´ · ʹ ʺ ʾ ʿ ˈ ˌ ’ ‡ \n"
-                    + "bnl; Non-Letters N2 (normative)\n"
-                    + "! \" # $ % & ( ) * + / 0 1 2 3 4 5 6 7 8 9 : ; < = > \n"
-                    + "? @ [ \\ ] ^ _ { | } ¡ ¢ £ ¥ § © ª « ¬ ® ¯ ° ± ² ³ µ \n"
-                    + "¶ ¹ º » ¿ × ÷ € \n"
-                    + "bnlopt; Non-Letters N3 (normative)\n"
-                    + "¤ ¦ ¸ ¼ ½ ¾ \n"
-                    + "bnlnot; Non-Letters N4 (normative)\n"
-                    + "-omitted-\n"
-                    + "dc; Combining diacritics (normative)\n"
-                    + "-omitted-\n"
-                    + "gl; Greek Letters (extended)\n"
-                    + "Ά Έ Ή Ί Ό Ύ Ώ ΐ Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ \n"
-                    + "Τ Υ Φ Χ Ψ Ω Ϊ Ϋ ά έ ή ί ΰ α β γ δ ε ζ η θ ι κ λ μ ν \n"
-                    + "ξ ο π ρ ς σ τ υ φ χ ψ ω ϊ ϋ ό ύ ώ \n"
-                    + "cl; Cyrillic Letters (extended)\n"
-                    + "Ѝ А Б В Г Д Е Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш \n"
-                    + "Щ Ъ Ь Ю Я а б в г д е ж з и й к л м н о п р с т у ф \n"
-                    + "х ц ч ш щ ъ ь ю я ѝ \n"
-                    + "enl; Non-Letters E1 (extended)\n"
-                    + "ƒ ʰ ʳ ˆ ˜ ˢ ᵈ ᵗ ‘ ‚ “ ” „ † … ‰ ′ ″ ‹ › ⁰ ⁴ ⁵ ⁶ ⁷ ⁸ \n"
-                    + "⁹ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ™ \n\n";
+            """
+                    bll; Latin Letters (normative)
+                    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z\s
+                    a b c d e f g h i j k l m n o p q r s t u v w x y z\s
+                    À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö Ø Ù Ú\s
+                    Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô\s
+                    õ ö ø ù ú û ü ý þ ÿ Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď ď\s
+                    Đ đ Ē ē Ĕ ĕ Ė ė Ę ę Ě ě Ĝ ĝ Ğ ğ Ġ ġ Ģ ģ Ĥ ĥ Ħ ħ Ĩ ĩ\s
+                    Ī ī Ĭ ĭ Į į İ ı IJ ij Ĵ ĵ Ķ ķ ĸ Ĺ ĺ Ļ ļ Ľ ľ Ŀ ŀ Ł ł Ń\s
+                    ń Ņ ņ Ň ň ʼn Ŋ ŋ Ō ō Ŏ ŏ Ő ő Œ œ Ŕ ŕ Ŗ ŗ Ř ř Ś ś Ŝ ŝ\s
+                    Ş ş Š š Ţ ţ Ť ť Ŧ ŧ Ũ ũ Ū ū Ŭ ŭ Ů ů Ű ű Ų ų Ŵ ŵ Ŷ ŷ\s
+                    Ÿ Ź ź Ż ż Ž ž Ƈ ƈ Ə Ɨ Ơ ơ Ư ư Ʒ Ǎ ǎ Ǐ ǐ Ǒ ǒ Ǔ ǔ Ǖ ǖ\s
+                    Ǘ ǘ Ǚ ǚ Ǜ ǜ Ǟ ǟ Ǣ ǣ Ǥ ǥ Ǧ ǧ Ǩ ǩ Ǫ ǫ Ǭ ǭ Ǯ ǯ ǰ Ǵ ǵ Ǹ\s
+                    ǹ Ǻ ǻ Ǽ ǽ Ǿ ǿ Ȓ ȓ Ș ș Ț ț Ȟ ȟ ȧ Ȩ ȩ Ȫ ȫ Ȭ ȭ Ȯ ȯ Ȱ ȱ\s
+                    Ȳ ȳ ə ɨ ʒ Ḃ ḃ Ḇ ḇ Ḋ ḋ Ḍ ḍ Ḏ ḏ Ḑ ḑ ḗ Ḝ ḝ Ḟ ḟ Ḡ ḡ Ḣ ḣ\s
+                    Ḥ ḥ Ḧ ḧ Ḩ ḩ Ḫ ḫ ḯ Ḱ ḱ Ḳ ḳ Ḵ ḵ Ḷ ḷ Ḻ ḻ Ṁ ṁ Ṃ ṃ Ṅ ṅ Ṇ\s
+                    ṇ Ṉ ṉ Ṓ ṓ Ṕ ṕ Ṗ ṗ Ṙ ṙ Ṛ ṛ Ṟ ṟ Ṡ ṡ Ṣ ṣ Ṫ ṫ Ṭ ṭ Ṯ ṯ Ẁ\s
+                    ẁ Ẃ ẃ Ẅ ẅ Ẇ ẇ Ẍ ẍ Ẏ ẏ Ẑ ẑ Ẓ ẓ Ẕ ẕ ẖ ẗ ẞ Ạ ạ Ả ả Ấ ấ\s
+                    Ầ ầ Ẩ ẩ Ẫ ẫ Ậ ậ Ắ ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ặ ặ Ẹ ẹ Ẻ ẻ Ẽ ẽ Ế ế\s
+                    Ề ề Ể ể Ễ ễ Ệ ệ Ỉ ỉ Ị ị Ọ ọ Ỏ ỏ Ố ố Ồ ồ Ổ ổ Ỗ ỗ Ộ ộ\s
+                    Ớ ớ Ờ ờ Ở ở Ỡ ỡ Ợ ợ Ụ ụ Ủ ủ Ứ ứ Ừ ừ Ử ử Ữ ữ Ự ự Ỳ ỳ\s
+                    Ỵ ỵ Ỷ ỷ Ỹ ỹ\s
+                    Sequences
+                    A̋ C̀ C̄ C̆ C̈ C̕ C̣ C̦ C̨̆ D̂ F̀ F̄ G̀ H̄ H̦ H̱ J́ J̌ K̀ K̂ K̄ K̇ K̕ K̛ K̦ K͟H\s
+                    K͟h L̂ L̥ L̥̄ L̦ M̀ M̂ M̆ M̐ N̂ N̄ N̆ N̦ P̀ P̄ P̕ P̣ R̆ R̥ R̥̄ S̀ S̄ S̛̄ S̱ T̀ T̄\s
+                    T̈ T̕ T̛ U̇ Z̀ Z̄ Z̆ Z̈ Z̧ a̋ c̀ c̄ c̆ c̈ c̕ c̣ c̦ c̨̆ d̂ f̀ f̄ g̀ h̄ h̦ j́ k̀\s
+                    k̂ k̄ k̇ k̕ k̛ k̦ k͟h l̂ l̥ l̥̄ l̦ m̀ m̂ m̆ m̐ n̂ n̄ n̆ n̦ p̀ p̄ p̕ p̣ r̆ r̥ r̥̄\s
+                    s̀ s̄ s̛̄ s̱ t̀ t̄ t̕ t̛ u̇ z̀ z̄ z̆ z̈ z̧ Ç̆ Û̄ ç̆ û̄ ÿ́ Č̕ Č̣ č̕ č̣ ē̍ Ī́ ī́\s
+                    ō̍ Ž̦ Ž̧ ž̦ ž̧ Ḳ̄ ḳ̄ Ṣ̄ ṣ̄ Ṭ̄ ṭ̄ Ạ̈ ạ̈ Ọ̈ ọ̈ Ụ̄ Ụ̈ ụ̄ ụ̈\s
+                    bnlreq; Non-Letters N1 (normative)
+                      ' , - . ` ~ ¨ ´ · ʹ ʺ ʾ ʿ ˈ ˌ ’ ‡\s
+                    bnl; Non-Letters N2 (normative)
+                    ! " # $ % & ( ) * + / 0 1 2 3 4 5 6 7 8 9 : ; < = >\s
+                    ? @ [ \\ ] ^ _ { | } ¡ ¢ £ ¥ § © ª « ¬ ® ¯ ° ± ² ³ µ\s
+                    ¶ ¹ º » ¿ × ÷ €\s
+                    bnlopt; Non-Letters N3 (normative)
+                    ¤ ¦ ¸ ¼ ½ ¾\s
+                    bnlnot; Non-Letters N4 (normative)
+                    -omitted-
+                    dc; Combining diacritics (normative)
+                    -omitted-
+                    gl; Greek Letters (extended)
+                    Ά Έ Ή Ί Ό Ύ Ώ ΐ Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ\s
+                    Τ Υ Φ Χ Ψ Ω Ϊ Ϋ ά έ ή ί ΰ α β γ δ ε ζ η θ ι κ λ μ ν\s
+                    ξ ο π ρ ς σ τ υ φ χ ψ ω ϊ ϋ ό ύ ώ\s
+                    cl; Cyrillic Letters (extended)
+                    Ѝ А Б В Г Д Е Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш\s
+                    Щ Ъ Ь Ю Я а б в г д е ж з и й к л м н о п р с т у ф\s
+                    х ц ч ш щ ъ ь ю я ѝ\s
+                    enl; Non-Letters E1 (extended)
+                    ƒ ʰ ʳ ˆ ˜ ˢ ᵈ ᵗ ‘ ‚ “ ” „ † … ‰ ′ ″ ‹ › ⁰ ⁴ ⁵ ⁶ ⁷ ⁸\s
+                    ⁹ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ™\s
+                    
+                    """;
 
     public static String LATIN_CHARS_DIN_91379_MATH =
-            "enl; Non Letters E1 (extended) math\n"
-                    + "∞ ≤ ≥ \n";
+            """
+                    enl; Non Letters E1 (extended) math
+                    ∞ ≤ ≥\s
+                    """;
 
     public static String LATIN_CHARS_ADDITIONAL =
-            "Additional non-letters (not included in DIN 91379)\n"
-                    + "– — •�\n\n";
+            """
+                    Additional non-letters (not included in DIN 91379)
+                    – — •�
+                    
+                    """;
 
 
     /**
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLiga.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLiga.java
index d250d0c9c..0e4f9e55b 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLiga.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLiga.java
@@ -28,8 +28,11 @@
 public class GlyphLayoutDocumentKernLiga {
 
     public static String INTRO_TEXT =
-            "Test of text attributes for kerning and ligatures\n"
-                    + "Using LayoutProcessor for glyph layout with Java built-in routines.\n\n";
+            """
+                    Test of text attributes for kerning and ligatures
+                    Using LayoutProcessor for glyph layout with Java built-in routines.
+                    
+                    """;
 
 
     public static String TEST_TEXT =
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLigaPerFont.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLigaPerFont.java
index 207c3d4c2..04b8149cc 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLigaPerFont.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutDocumentKernLigaPerFont.java
@@ -28,8 +28,11 @@
 public class GlyphLayoutDocumentKernLigaPerFont {
 
     public static String TEXT_INTRO =
-            "Test of kerning and ligatures per font\n"
-                    + "Using LayoutProcessor for glyph layout with Java built-in routines.\n\n";
+            """
+                    Test of kerning and ligatures per font
+                    Using LayoutProcessor for glyph layout with Java built-in routines.
+                    
+                    """;
 
 
     public static String TEST_TEXT =
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutFormDin91379.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutFormDin91379.java
index 7d87c593a..3a4f261f9 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutFormDin91379.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutFormDin91379.java
@@ -27,66 +27,73 @@
 public class GlyphLayoutFormDin91379 {
 
     public static String TEXT_INTRO =
-            "Test of formatting for letters and sequences defined in:\n"
-                    + "DIN 91379:2022-08: Characters and defined character sequences in Unicode for the\n"
-                    + "electronic processing of names and data exchange in Europe, with CD-ROM.\n"
-                    + "See https://github.com/String-Latin/DIN-91379-Characters-and-Sequences\n"
-                    + "and https://en.wikipedia.org/wiki/DIN_91379\n\n"
-                    + "Fonts used: Noto Sans Regular, Noto Sans Math Regular, Noto Serif Regular\n"
-                    + "See https://fonts.google.com/noto/specimen/Noto+Sans\n"
-                    + "and https://github.com/googlefonts/noto-fonts/tree/main/hinted/ttf\n"
-                    + "Using LayoutProcessor for glyph layout with Java built-in routines.\n\n";
+            """
+                    Test of formatting for letters and sequences defined in:
+                    DIN 91379:2022-08: Characters and defined character sequences in Unicode for the
+                    electronic processing of names and data exchange in Europe, with CD-ROM.
+                    See https://github.com/String-Latin/DIN-91379-Characters-and-Sequences
+                    and https://en.wikipedia.org/wiki/DIN_91379
+                    
+                    Fonts used: Noto Sans Regular, Noto Sans Math Regular, Noto Serif Regular
+                    See https://fonts.google.com/noto/specimen/Noto+Sans
+                    and https://github.com/googlefonts/noto-fonts/tree/main/hinted/ttf
+                    Using LayoutProcessor for glyph layout with Java built-in routines.
+                    
+                    """;
 
     public static String LATIN_CHARS_DIN_91379 =
-            "bll; Latin Letters (normative)\n"
-                    + "A B C D E F G H I J K L M N O P Q R S T U V W X Y Z "
-                    + "a b c d e f g h i j k l m n o p q r s t u v w x y z "
-                    + "À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö Ø Ù Ú "
-                    + "Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô "
-                    + "õ ö ø ù ú û ü ý þ ÿ Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď ď "
-                    + "Đ đ Ē ē Ĕ ĕ Ė ė Ę ę Ě ě Ĝ ĝ Ğ ğ Ġ ġ Ģ ģ Ĥ ĥ Ħ ħ Ĩ ĩ "
-                    + "Ī ī Ĭ ĭ Į į İ ı IJ ij Ĵ ĵ Ķ ķ ĸ Ĺ ĺ Ļ ļ Ľ ľ Ŀ ŀ Ł ł Ń "
-                    + "ń Ņ ņ Ň ň ʼn Ŋ ŋ Ō ō Ŏ ŏ Ő ő Œ œ Ŕ ŕ Ŗ ŗ Ř ř Ś ś Ŝ ŝ "
-                    + "Ş ş Š š Ţ ţ Ť ť Ŧ ŧ Ũ ũ Ū ū Ŭ ŭ Ů ů Ű ű Ų ų Ŵ ŵ Ŷ ŷ "
-                    + "Ÿ Ź ź Ż ż Ž ž Ƈ ƈ Ə Ɨ Ơ ơ Ư ư Ʒ Ǎ ǎ Ǐ ǐ Ǒ ǒ Ǔ ǔ Ǖ ǖ "
-                    + "Ǘ ǘ Ǚ ǚ Ǜ ǜ Ǟ ǟ Ǣ ǣ Ǥ ǥ Ǧ ǧ Ǩ ǩ Ǫ ǫ Ǭ ǭ Ǯ ǯ ǰ Ǵ ǵ Ǹ "
-                    + "ǹ Ǻ ǻ Ǽ ǽ Ǿ ǿ Ȓ ȓ Ș ș Ț ț Ȟ ȟ ȧ Ȩ ȩ Ȫ ȫ Ȭ ȭ Ȯ ȯ Ȱ ȱ "
-                    + "Ȳ ȳ ə ɨ ʒ Ḃ ḃ Ḇ ḇ Ḋ ḋ Ḍ ḍ Ḏ ḏ Ḑ ḑ ḗ Ḝ ḝ Ḟ ḟ Ḡ ḡ Ḣ ḣ "
-                    + "Ḥ ḥ Ḧ ḧ Ḩ ḩ Ḫ ḫ ḯ Ḱ ḱ Ḳ ḳ Ḵ ḵ Ḷ ḷ Ḻ ḻ Ṁ ṁ Ṃ ṃ Ṅ ṅ Ṇ "
-                    + "ṇ Ṉ ṉ Ṓ ṓ Ṕ ṕ Ṗ ṗ Ṙ ṙ Ṛ ṛ Ṟ ṟ Ṡ ṡ Ṣ ṣ Ṫ ṫ Ṭ ṭ Ṯ ṯ Ẁ "
-                    + "ẁ Ẃ ẃ Ẅ ẅ Ẇ ẇ Ẍ ẍ Ẏ ẏ Ẑ ẑ Ẓ ẓ Ẕ ẕ ẖ ẗ ẞ Ạ ạ Ả ả Ấ ấ "
-                    + "Ầ ầ Ẩ ẩ Ẫ ẫ Ậ ậ Ắ ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ặ ặ Ẹ ẹ Ẻ ẻ Ẽ ẽ Ế ế "
-                    + "Ề ề Ể ể Ễ ễ Ệ ệ Ỉ ỉ Ị ị Ọ ọ Ỏ ỏ Ố ố Ồ ồ Ổ ổ Ỗ ỗ Ộ ộ "
-                    + "Ớ ớ Ờ ờ Ở ở Ỡ ỡ Ợ ợ Ụ ụ Ủ ủ Ứ ứ Ừ ừ Ử ử Ữ ữ Ự ự Ỳ ỳ "
-                    + "Ỵ ỵ Ỷ ỷ Ỹ ỹ \n"
-                    + "Sequences\n"
-                    + "A̋ C̀ C̄ C̆ C̈ C̕ C̣ C̦ C̨̆ D̂ F̀ F̄ G̀ H̄ H̦ H̱ J́ J̌ K̀ K̂ K̄ K̇ K̕ K̛ K̦ K͟H "
-                    + "K͟h L̂ L̥ L̥̄ L̦ M̀ M̂ M̆ M̐ N̂ N̄ N̆ N̦ P̀ P̄ P̕ P̣ R̆ R̥ R̥̄ S̀ S̄ S̛̄ S̱ T̀ T̄ "
-                    + "T̈ T̕ T̛ U̇ Z̀ Z̄ Z̆ Z̈ Z̧ a̋ c̀ c̄ c̆ c̈ c̕ c̣ c̦ c̨̆ d̂ f̀ f̄ g̀ h̄ h̦ j́ k̀ "
-                    + "k̂ k̄ k̇ k̕ k̛ k̦ k͟h l̂ l̥ l̥̄ l̦ m̀ m̂ m̆ m̐ n̂ n̄ n̆ n̦ p̀ p̄ p̕ p̣ r̆ r̥ r̥̄ "
-                    + "s̀ s̄ s̛̄ s̱ t̀ t̄ t̕ t̛ u̇ z̀ z̄ z̆ z̈ z̧ Ç̆ Û̄ ç̆ û̄ ÿ́ Č̕ Č̣ č̕ č̣ ē̍ Ī́ ī́ "
-                    + "ō̍ Ž̦ Ž̧ ž̦ ž̧ Ḳ̄ ḳ̄ Ṣ̄ ṣ̄ Ṭ̄ ṭ̄ Ạ̈ ạ̈ Ọ̈ ọ̈ Ụ̄ Ụ̈ ụ̄ ụ̈ \n"
-                    + "bnlreq; Non-Letters N1 (normative)\n"
-                    + "  ' , - . ` ~ ¨ ´ · ʹ ʺ ʾ ʿ ˈ ˌ ’ ‡ \n"
-                    + "bnl; Non-Letters N2 (normative)\n"
-                    + "! \" # $ % & ( ) * + / 0 1 2 3 4 5 6 7 8 9 : ; < = > "
-                    + "? @ [ \\ ] ^ _ { | } ¡ ¢ £ ¥ § © ª « ¬ ® ¯ ° ± ² ³ µ "
-                    + "¶ ¹ º » ¿ × ÷ € \n"
-                    + "bnlopt; Non-Letters N3 (normative)\n"
-                    + "¤ ¦ ¸ ¼ ½ ¾ \n"
-                    + "bnlnot; Non-Letters N4 (normative) -omitted-\n"
-                    + "dc; Combining diacritics (normative) -omitted-\n"
-                    + "gl; Greek Letters (extended)\n"
-                    + "Ά Έ Ή Ί Ό Ύ Ώ ΐ Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ "
-                    + "Τ Υ Φ Χ Ψ Ω Ϊ Ϋ ά έ ή ί ΰ α β γ δ ε ζ η θ ι κ λ μ ν "
-                    + "ξ ο π ρ ς σ τ υ φ χ ψ ω ϊ ϋ ό ύ ώ \n"
-                    + "cl; Cyrillic Letters (extended)\n"
-                    + "Ѝ А Б В Г Д Е Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш "
-                    + "Щ Ъ Ь Ю Я а б в г д е ж з и й к л м н о п р с т у ф "
-                    + "х ц ч ш щ ъ ь ю я ѝ \n"
-                    + "enl; Non-Letters E1 (extended)\n"
-                    + "ƒ ʰ ʳ ˆ ˜ ˢ ᵈ ᵗ ‘ ‚ “ ” „ † … ‰ ′ ″ ‹ › ⁰ ⁴ ⁵ ⁶ ⁷ ⁸ "
-                    + "⁹ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ™ ∞ ≤ ≥ \n\n";
+            """
+                    bll; Latin Letters (normative)
+                    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \
+                    a b c d e f g h i j k l m n o p q r s t u v w x y z \
+                    À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö Ø Ù Ú \
+                    Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô \
+                    õ ö ø ù ú û ü ý þ ÿ Ā ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď ď \
+                    Đ đ Ē ē Ĕ ĕ Ė ė Ę ę Ě ě Ĝ ĝ Ğ ğ Ġ ġ Ģ ģ Ĥ ĥ Ħ ħ Ĩ ĩ \
+                    Ī ī Ĭ ĭ Į į İ ı IJ ij Ĵ ĵ Ķ ķ ĸ Ĺ ĺ Ļ ļ Ľ ľ Ŀ ŀ Ł ł Ń \
+                    ń Ņ ņ Ň ň ʼn Ŋ ŋ Ō ō Ŏ ŏ Ő ő Œ œ Ŕ ŕ Ŗ ŗ Ř ř Ś ś Ŝ ŝ \
+                    Ş ş Š š Ţ ţ Ť ť Ŧ ŧ Ũ ũ Ū ū Ŭ ŭ Ů ů Ű ű Ų ų Ŵ ŵ Ŷ ŷ \
+                    Ÿ Ź ź Ż ż Ž ž Ƈ ƈ Ə Ɨ Ơ ơ Ư ư Ʒ Ǎ ǎ Ǐ ǐ Ǒ ǒ Ǔ ǔ Ǖ ǖ \
+                    Ǘ ǘ Ǚ ǚ Ǜ ǜ Ǟ ǟ Ǣ ǣ Ǥ ǥ Ǧ ǧ Ǩ ǩ Ǫ ǫ Ǭ ǭ Ǯ ǯ ǰ Ǵ ǵ Ǹ \
+                    ǹ Ǻ ǻ Ǽ ǽ Ǿ ǿ Ȓ ȓ Ș ș Ț ț Ȟ ȟ ȧ Ȩ ȩ Ȫ ȫ Ȭ ȭ Ȯ ȯ Ȱ ȱ \
+                    Ȳ ȳ ə ɨ ʒ Ḃ ḃ Ḇ ḇ Ḋ ḋ Ḍ ḍ Ḏ ḏ Ḑ ḑ ḗ Ḝ ḝ Ḟ ḟ Ḡ ḡ Ḣ ḣ \
+                    Ḥ ḥ Ḧ ḧ Ḩ ḩ Ḫ ḫ ḯ Ḱ ḱ Ḳ ḳ Ḵ ḵ Ḷ ḷ Ḻ ḻ Ṁ ṁ Ṃ ṃ Ṅ ṅ Ṇ \
+                    ṇ Ṉ ṉ Ṓ ṓ Ṕ ṕ Ṗ ṗ Ṙ ṙ Ṛ ṛ Ṟ ṟ Ṡ ṡ Ṣ ṣ Ṫ ṫ Ṭ ṭ Ṯ ṯ Ẁ \
+                    ẁ Ẃ ẃ Ẅ ẅ Ẇ ẇ Ẍ ẍ Ẏ ẏ Ẑ ẑ Ẓ ẓ Ẕ ẕ ẖ ẗ ẞ Ạ ạ Ả ả Ấ ấ \
+                    Ầ ầ Ẩ ẩ Ẫ ẫ Ậ ậ Ắ ắ Ằ ằ Ẳ ẳ Ẵ ẵ Ặ ặ Ẹ ẹ Ẻ ẻ Ẽ ẽ Ế ế \
+                    Ề ề Ể ể Ễ ễ Ệ ệ Ỉ ỉ Ị ị Ọ ọ Ỏ ỏ Ố ố Ồ ồ Ổ ổ Ỗ ỗ Ộ ộ \
+                    Ớ ớ Ờ ờ Ở ở Ỡ ỡ Ợ ợ Ụ ụ Ủ ủ Ứ ứ Ừ ừ Ử ử Ữ ữ Ự ự Ỳ ỳ \
+                    Ỵ ỵ Ỷ ỷ Ỹ ỹ\s
+                    Sequences
+                    A̋ C̀ C̄ C̆ C̈ C̕ C̣ C̦ C̨̆ D̂ F̀ F̄ G̀ H̄ H̦ H̱ J́ J̌ K̀ K̂ K̄ K̇ K̕ K̛ K̦ K͟H \
+                    K͟h L̂ L̥ L̥̄ L̦ M̀ M̂ M̆ M̐ N̂ N̄ N̆ N̦ P̀ P̄ P̕ P̣ R̆ R̥ R̥̄ S̀ S̄ S̛̄ S̱ T̀ T̄ \
+                    T̈ T̕ T̛ U̇ Z̀ Z̄ Z̆ Z̈ Z̧ a̋ c̀ c̄ c̆ c̈ c̕ c̣ c̦ c̨̆ d̂ f̀ f̄ g̀ h̄ h̦ j́ k̀ \
+                    k̂ k̄ k̇ k̕ k̛ k̦ k͟h l̂ l̥ l̥̄ l̦ m̀ m̂ m̆ m̐ n̂ n̄ n̆ n̦ p̀ p̄ p̕ p̣ r̆ r̥ r̥̄ \
+                    s̀ s̄ s̛̄ s̱ t̀ t̄ t̕ t̛ u̇ z̀ z̄ z̆ z̈ z̧ Ç̆ Û̄ ç̆ û̄ ÿ́ Č̕ Č̣ č̕ č̣ ē̍ Ī́ ī́ \
+                    ō̍ Ž̦ Ž̧ ž̦ ž̧ Ḳ̄ ḳ̄ Ṣ̄ ṣ̄ Ṭ̄ ṭ̄ Ạ̈ ạ̈ Ọ̈ ọ̈ Ụ̄ Ụ̈ ụ̄ ụ̈\s
+                    bnlreq; Non-Letters N1 (normative)
+                      ' , - . ` ~ ¨ ´ · ʹ ʺ ʾ ʿ ˈ ˌ ’ ‡\s
+                    bnl; Non-Letters N2 (normative)
+                    ! " # $ % & ( ) * + / 0 1 2 3 4 5 6 7 8 9 : ; < = > \
+                    ? @ [ \\ ] ^ _ { | } ¡ ¢ £ ¥ § © ª « ¬ ® ¯ ° ± ² ³ µ \
+                    ¶ ¹ º » ¿ × ÷ €\s
+                    bnlopt; Non-Letters N3 (normative)
+                    ¤ ¦ ¸ ¼ ½ ¾\s
+                    bnlnot; Non-Letters N4 (normative) -omitted-
+                    dc; Combining diacritics (normative) -omitted-
+                    gl; Greek Letters (extended)
+                    Ά Έ Ή Ί Ό Ύ Ώ ΐ Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ \
+                    Τ Υ Φ Χ Ψ Ω Ϊ Ϋ ά έ ή ί ΰ α β γ δ ε ζ η θ ι κ λ μ ν \
+                    ξ ο π ρ ς σ τ υ φ χ ψ ω ϊ ϋ ό ύ ώ\s
+                    cl; Cyrillic Letters (extended)
+                    Ѝ А Б В Г Д Е Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш \
+                    Щ Ъ Ь Ю Я а б в г д е ж з и й к л м н о п р с т у ф \
+                    х ц ч ш щ ъ ь ю я ѝ\s
+                    enl; Non-Letters E1 (extended)
+                    ƒ ʰ ʳ ˆ ˜ ˢ ᵈ ᵗ ‘ ‚ “ ” „ † … ‰ ′ ″ ‹ › ⁰ ⁴ ⁵ ⁶ ⁷ ⁸ \
+                    ⁹ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ™ ∞ ≤ ≥\s
+                    
+                    """;
 
     /**
      * Main method
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutSMP.java b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutSMP.java
index 55d327f5d..47045bc53 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutSMP.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/fonts/GlyphLayoutSMP.java
@@ -28,7 +28,11 @@
 public class GlyphLayoutSMP {
 
     private static final String TEXT_INTRO =
-            "Test of Letters from the Supplementary Multilingual Plane\n\n" + "Mathematical Alphanumeric Symbols\n";
+            """
+                    Test of Letters from the Supplementary Multilingual Plane
+                    
+                    Mathematical Alphanumeric Symbols
+                    """;
 
     private static final int[] MATHEMATICAL_CODEPOINTS = new int[]{0x1D504, 0x1D505, 0x212D, 0x1D507, 0x1D508, 0x1D509,
             0x1D50A, 0x210C, 0x2111, 0x1D50D, 0x1D50E, 0x1D50F, 0x1D510, 0x1D511, 0x1D512, 0x1D513, 0x1D514, 0x211C,
diff --git a/pdf-toolbox/src/test/java/org/openpdf/examples/html/JavaScriptAction.java b/pdf-toolbox/src/test/java/org/openpdf/examples/html/JavaScriptAction.java
index 07b7f5097..6ae39dea5 100644
--- a/pdf-toolbox/src/test/java/org/openpdf/examples/html/JavaScriptAction.java
+++ b/pdf-toolbox/src/test/java/org/openpdf/examples/html/JavaScriptAction.java
@@ -69,10 +69,13 @@ public static void main(String[] args) {
             document.open();
             // step 4: we add some content
             Phrase phrase1 = new Phrase(
-                    "There are 3 JavaScript functions in the HTML page, load(), unload() and sayHi().\n\n" +
-                            "The first one will be called when the HTML page has been loaded by your browser.\n" +
-                            "The second one will be called when the HTML page is being unloaded,\n" +
-                            "for example when you go to another page.\n");
+                    """
+                            There are 3 JavaScript functions in the HTML page, load(), unload() and sayHi().
+                            
+                            The first one will be called when the HTML page has been loaded by your browser.
+                            The second one will be called when the HTML page is being unloaded,
+                            for example when you go to another page.
+                            """);
             document.add(phrase1);
 
             // add a HTML link <A HREF="...">