fix comma location in various places (GH-19233)

(cherry picked from commit c49016e67c3255b37599b354a8d7995d40663991)

Co-authored-by: Mathieu Dupuy <deronnax@users.noreply.github.com>
diff --git a/Doc/library/tokenize.rst b/Doc/library/tokenize.rst
index 96778f2..11f569d 100644
--- a/Doc/library/tokenize.rst
+++ b/Doc/library/tokenize.rst
@@ -13,7 +13,7 @@
 
 The :mod:`tokenize` module provides a lexical scanner for Python source code,
 implemented in Python.  The scanner in this module returns comments as tokens
-as well, making it useful for implementing "pretty-printers," including
+as well, making it useful for implementing "pretty-printers", including
 colorizers for on-screen displays.
 
 To simplify token stream handling, all :ref:`operator <operators>` and