Fix regex so that it works with Python 3.6.

See <https://docs.python.org/3/library/re.html#re.LOCALE>.

Copied from upstream bug report:
https://bugs.launchpad.net/python-mox3/+bug/1665266

From 05064cdb6ea7a16450c6beae2b6f7c6074212a69 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 16 Feb 2017 00:24:10 -0800
Subject: [PATCH] RegexTest: python3.6 compatibility

These fixes are backward-compatible with older python versions:

* raw strings fix invalid escape sequences
* flags=8 fixes ValueError: cannot use LOCALE flag with a str pattern
---
 mox3/tests/test_mox.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mox3/tests/test_mox.py b/mox3/tests/test_mox.py
index 15ac565..3a1af17 100644
--- a/mox3/tests/test_mox.py
+++ b/mox3/tests/test_mox.py
@@ -312,12 +312,12 @@ class RegexTest(testtools.TestCase):
     def testReprWithoutFlags(self):
         """repr should return the regular expression pattern."""
         self.assertTrue(
-            repr(mox.Regex(r"a\s+b")) == "<regular expression 'a\s+b'>")
+            repr(mox.Regex(r"a\s+b")) == r"<regular expression 'a\s+b'>")
 
     def testReprWithFlags(self):
         """repr should return the regular expression pattern and flags."""
-        self.assertTrue(repr(mox.Regex(r"a\s+b", flags=4)) ==
-                        "<regular expression 'a\s+b', flags=4>")
+        self.assertTrue(repr(mox.Regex(r"a\s+b", flags=8)) ==
+                        r"<regular expression 'a\s+b', flags=8>")
 
 
 class IsTest(testtools.TestCase):
-- 
2.10.2

m class='right' method='get' action='/guix/log/gnu/build/secret-service.scm'>
<input type='hidden' name='id' value='4ba9f3e0f1484524f91ca1f7ec3a4ce7cb8873ff'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
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</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=4ba9f3e0f1484524f91ca1f7ec3a4ce7cb8873ff'>root</a>/<a href='/guix/log/gnu?id=4ba9f3e0f1484524f91ca1f7ec3a4ce7cb8873ff'>gnu</a>/<a href='/guix/log/gnu/build?id=4ba9f3e0f1484524f91ca1f7ec3a4ce7cb8873ff'>build</a>/<a href='/guix/log/gnu/build/secret-service.scm?id=4ba9f3e0f1484524f91ca1f7ec3a4ce7cb8873ff'>secret-service.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/build/secret-service.scm?id=4ba9f3e0f1484524f91ca1f7ec3a4ce7cb8873ff&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-02-10 22:59:43 +0100'>2024-02-10</span></td><td><a href='/guix/commit/gnu/build/secret-service.scm?id=f331a667d3827c5c7603c87956c601d5e42ef82b'>services: secret-service: Make the endpoint configurable.</a><span class='msg-avail'>...<span class='msg-tooltip'>Until now, the secret service had a hard-coded TCP endpoint on port
1004.  This change lets users specify arbitrary socket addresses.

* gnu/build/secret-service.scm (socket-address-&gt;string): New procedure,
taken from Shepherd.
(secret-service-send-secrets): Replace ‘port’ by ‘address’ and adjust
accordingly.
(secret-service-receive-secrets): Likewise.
* gnu/services/virtualization.scm (secret-service-shepherd-services):
Likewise.
(secret-service-operating-system): Add optional ‘address’ parameter and
honor it.  Adjust ‘start’ method accordingly.

Change-Id: I87a9514f1c170dca756ce76083d7182c6ebf6578
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-10-01 22:58:19 +0200'>2023-10-01</span></td><td><a href='/guix/commit/gnu/build/secret-service.scm?id=e90a972ce232a6a57995df1ed90c9ddbaf5dbcae'>secret-service: Increase default handshake timeout.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/secret-service.scm (secret-service-send-secrets):
Increase #:handshake-timeout.
</span></span></td><td>Ludovic Courtès</td></tr>