# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 2019-04-05 01:01:48
# Node ID fecbd93a5f0847092f1b69d74f95a14b6c8d83d2
# Parent  0e9066db5e4439945e4796f19b99e585e8b4deaa

setup: use raw string for regular expression

Otherwise Python 3.8 complains about the backslash.

Differential Revision: https://phab.mercurial-scm.org/D6202

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -796,7 +796,7 @@ class hgbuilddoc(Command):
 
         # This logic is duplicated in doc/Makefile.
         sources = {f for f in os.listdir('mercurial/help')
-                   if re.search('[0-9]\.txt$', f)}
+                   if re.search(r'[0-9]\.txt$', f)}
 
         # common.txt is a one-off.
         gentxt('common')