bpo-36645: Fix ambiguous formatting in re.sub() documentation (GH-12879)

(cherry picked from commit 5ebfa840a1c9967da299356733da41b532688988)

Co-authored-by: mollison <mollison@cs.unc.edu>

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index dc3f428b8a19c0a7cd203c91f36f28a2a4256da1..2e6c7f715d20d68baf527006bf7aba0d8f27c933 100644 (file)
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -902,6 +902,7 @@ form.
       Unknown escapes in *repl* consisting of ``'\'`` and an ASCII letter
       now are errors.
 
+   .. versionchanged:: 3.7
       Empty matches for the pattern are replaced when adjacent to a previous
       non-empty match.