gh-73138 Add strict attribute to csv.Dialect

Author: shoeffner

Lib/csv.py

@@ -26,7 +26,7 @@ class Dialect:
 
     This must be subclassed (see csv.excel).  Valid attributes are:
     delimiter, quotechar, escapechar, doublequote, skipinitialspace,
-    lineterminator, quoting.
+    lineterminator, quoting, strict.
 
     """
     _name = ""
@@ -39,6 +39,7 @@ class Dialect:
     skipinitialspace = None
     lineterminator = None
     quoting = None
+    strict = None
 
     def __init__(self):
         if self.__class__ != Dialect:

Misc/NEWS.d/next/Library/2022-12-18-21-24-48.gh-issue-73138.9TOxub.rst

@@ -0,0 +1 @@
+Add missing :attr:`Dialect.strict` attribute to :class:`csv.Dialect`.