The Clar test framework has a bug whereby it skips the parsing phase
on files with mtime=0.

Reported upstream at <https://github.com/vmg/clar/pull/78>.

diff --git a/tests/generate.py b/tests/generate.py
index b639c8f..111ca41 100644
--- a/tests/generate.py
+++ b/tests/generate.py
@@ -63,3 +63,3 @@ class Module(object):
 
-        self.mtime = 0
+        self.mtime = None # Guix sets all file mtimes to '0'
         self.enabled = True
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<tr><td><span title='2022-10-17 10:45:10 +0200'>2022-10-17</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=c2cb1160322c5b18b839b3c2ab0d53fb78793125'>gnu: Add hunspell-dict-hu.</a><span class='msg-avail'>...</span></td><td>Attila Lendvai</td></tr>
<tr><td><span title='2022-10-11 11:29:02 +0000'>2022-10-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=f81abf389813b7b82f06db1607274caa68246a6a'>gnu: libreoffice: Move inputs below arguments and fix indentation.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-08-27 00:09:02 +0200'>2022-08-27</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=4aa3bae2c6b6f05464d4ed5864af8156bd76fe67'>gnu: libreoffice: Add release-monitoring-url.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-16 00:43:43 +0200'>2022-08-16</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=1e969dafb7d004ae3405cc2de3669e1c97000ce0'>gnu: libreoffice: Remove obsolete workaround.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-11 00:21:11 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=a66b9063d1158f129e46ae0b99f1e7cbbc8c16b1'>gnu: libreoffice: Remove input labels.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-11 00:21:11 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=8bdc95ecae30a850f65ba77a13920a9f7ccdaa61'>gnu: libreoffice: Update to 7.3.5.2.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-11 00:21:11 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=47710f2a4ff3dace3e09a79e82cfb0f5d7346bd9'>gnu: libcmis: Update to 0.5.2-46-gf264a61.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-11 00:21:11 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=178b762d686405a25dcc7bbf2f4dda98df8a3bde'>gnu: libetonyek: Don't hard code mdds version.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-11 00:21:11 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=ce0aa88d1cfe663fa3d64814a3d14b64219cbefe'>gnu: orcus: Update to 0.17.2.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-11 00:21:11 +0200'>2022-08-11</span></td><td><a href='/guix/commit/gnu/packages/libreoffice.scm?id=c61e7ddd294a1e15df97b329112b92ecd9a9781a'>gnu: ixion: Update to 0.17.0.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>