diff -r b4cfd803b3f2 -r de275ab362cb mercurial/utils/stringutil.py
--- a/mercurial/utils/stringutil.py	Tue Jun 26 11:38:58 2018 -0400
+++ b/mercurial/utils/stringutil.py	Wed Jun 27 10:21:07 2018 -0400
@@ -25,7 +25,7 @@
 
 # regex special chars pulled from https://bugs.python.org/issue29995
 # which was part of Python 3.7.
-_respecial = pycompat.bytestr(b'()[]{}?*+-|^$\\.# \t\n\r\v\f')
+_respecial = pycompat.bytestr(b'()[]{}?*+-|^$\\.&~# \t\n\r\v\f')
 _regexescapemap = {ord(i): (b'\\' + i).decode('latin1') for i in _respecial}
 
 def reescape(pat):