diff -r ac3cb5e05a38 -r 6d3b67a837a6 mercurial/hgweb/wsgiheaders.py
--- a/mercurial/hgweb/wsgiheaders.py	Sat Dec 28 01:12:19 2019 -0500
+++ b/mercurial/hgweb/wsgiheaders.py	Sat Dec 28 01:35:05 2019 -0500
@@ -13,7 +13,7 @@
 
 import re
 
-tspecials = re.compile(br'[ \(\)<>@,;:\\"/\[\]\?=]')
+tspecials = re.compile(br'[ ()<>@,;:\\"/\[\]?=]')
 
 
 def _formatparam(param, value=None, quote=1):