[Python-checkins] Fix invalid escape sequences in the peg_highlight Sphinx extension (GH-22047)

[Pablo Galindo]

https://github.com/python/cpython/commit/5a4a963a6c798fa9207a9998618a9c0ec3b6b6d7
commit: 5a4a963a6c798fa9207a9998618a9c0ec3b6b6d7
branch: master
author: Pablo Galindo <Pablogsal at gmail.com>
committer: GitHub <noreply at github.com>
date: 2020-09-02T15:29:38+01:00
summary:

Fix invalid escape sequences in the peg_highlight Sphinx extension (GH-22047)

files:
M Doc/tools/extensions/peg_highlight.py

diff --git a/Doc/tools/extensions/peg_highlight.py b/Doc/tools/extensions/peg_highlight.py
index f02515d3919cf..8bc24670fbe0a 100644
--- a/Doc/tools/extensions/peg_highlight.py
+++ b/Doc/tools/extensions/peg_highlight.py
@@ -59,7 +59,7 @@ class PEGLexer(RegexLexer):
             include("variables"),
             (r"\b(?!(NULL|EXTRA))([A-Z_]+)\b\s*(?!\()", Text,),
             (
-                r"^\s*" + _name + "\s*" + "(\[.*\])?" + "\s*" + "(\(.+\))?" + "\s*(:)",
+                r"^\s*" + _name + r"\s*" + r"(\[.*\])?" + r"\s*" + r"(\(.+\))?" + r"\s*(:)",
                 bygroups(Name.Function, None, None, Punctuation),
             ),
             (_name, Name.Function),