update-manpages: explicitly strip color codes

On some systems, help2man produces color codes in the output.  Remove
them to avoid manpage churn.

Also begin adding unit tests.

Change-Id: I3f0204b19d9cae524d3cb5fcfb61ee309b0931fc
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/349655
Tested-by: LaMont Jones <lamontjones@google.com>
Reviewed-by: Xin Li <delphij@google.com>

tests/test_update_manpages.py

@@ -0,0 +1,27 @@
+# Copyright 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Unittests for the update_manpages module."""
+
+import unittest
+import tests.update_manpages as um
+
+
+class UpdateManpagesTest(unittest.TestCase):
+  """Tests the update-manpages code."""
+
+  def test_replace_regex(self):
+    """Check that replace_regex works."""
+    data = '\n\033[1mSummary\033[m\n'
+    self.assertEqual(um.replace_regex(data),'\nSummary\n')

tests/update_manpages.py

@@ -0,0 +1 @@
+update-manpages