Stop parsing "," as part of lambda definition.

Author: vpetrovykh

grammars/MagicPython.cson

@@ -1134,7 +1134,7 @@ repository:
             name: "keyword.control.flow.python"
       }
       {
-        match: "\\b(lambda)\\s*?([,\\n]|$)"
+        match: "\\b(lambda)\\s*?(?=[,\\n]|$)"
         captures:
           "1":
             name: "storage.type.function.lambda.python"

grammars/MagicPython.tmLanguage

@@ -1755,7 +1755,7 @@
           </dict>
           <dict>
             <key>match</key>
-            <string>\b(lambda)\s*?([,\n]|$)</string>
+            <string>\b(lambda)\s*?(?=[,\n]|$)</string>
             <key>captures</key>
             <dict>
               <key>1</key>

grammars/src/MagicPython.syntax.yaml

@@ -897,7 +897,7 @@ repository:
       - match: ((?<=\.)lambda|lambda(?=\s*[\.=]))
         captures:
           '1': {name: keyword.control.flow.python}
-      - match: \b(lambda)\s*?([,\n]|$)
+      - match: \b(lambda)\s*?(?=[,\n]|$)
         captures:
           '1': {name: storage.type.function.lambda.python}
       - name: meta.lambda-function.python