New submission from Karthikeyan Singaravelan <tir.kar...@gmail.com>:

Following warnings are caused in Doc/tools/extensions/peg_highlight.py . These 
warnings show up during doc builds since the extension is used in the build. 
This is an easy issue to fix.

./python -Wall -m py_compile /root/cpython/Doc/tools/extensions/peg_highlight.py
/root/cpython/Doc/tools/extensions/peg_highlight.py:62: DeprecationWarning: 
invalid escape sequence \s
  r"^\s*" + _name + "\s*" + "(\[.*\])?" + "\s*" + "(\(.+\))?" + "\s*(:)",
/root/cpython/Doc/tools/extensions/peg_highlight.py:62: DeprecationWarning: 
invalid escape sequence \[
  r"^\s*" + _name + "\s*" + "(\[.*\])?" + "\s*" + "(\(.+\))?" + "\s*(:)",
/root/cpython/Doc/tools/extensions/peg_highlight.py:62: DeprecationWarning: 
invalid escape sequence \s
  r"^\s*" + _name + "\s*" + "(\[.*\])?" + "\s*" + "(\(.+\))?" + "\s*(:)",
/root/cpython/Doc/tools/extensions/peg_highlight.py:62: DeprecationWarning: 
invalid escape sequence \(
  r"^\s*" + _name + "\s*" + "(\[.*\])?" + "\s*" + "(\(.+\))?" + "\s*(:)",
/root/cpython/Doc/tools/extensions/peg_highlight.py:62: DeprecationWarning: 
invalid escape sequence \s
  r"^\s*" + _name + "\s*" + "(\[.*\])?" + "\s*" + "(\(.+\))?" + "\s*(:)",

----------
components: Build
messages: 376158
nosy: pablogsal, xtreak
priority: normal
severity: normal
status: open
title: Deprecation warning due to invalid escape sequences in 
Doc/tools/extensions/peg_highlight.py
type: behavior
versions: Python 3.10

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41679>
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