Multi-line `replace` doesn't work for lines starting with `#`

[Penacillin]

NOTE: This is a duplicate of peritus/bumpversion#199 . Just adding this here since that's not maintained anymore.

Wanted to bring that same issue up here, as it still seems relevant

[kdeldycke]

Here is how it might be fixed using a custom parser as in ConfigParser(interpolation=ExtendedInterpolation()): https://docs.python.org/3/library/configparser.html?highlight=configfile#customizing-parser-behaviour

[sanderr]

If I understand correctly, there is actually already a workaround for this, though it is not documented yet. I added documentation in #261, which is still in review.