Don't replace version numbers of *partial* matches

Given a setup.py file containing those two lines:

if pkg_resources.get_distribution("setuptools").version < "40.1.1":

# ... other lines

    version="0.1.1",

If you bump the version (the patch for example), it will modify 40.1.1 to 40.1.2. This is because it’s a simple replace using the current version. It probably should use a regex to find the version the file. The only work around I found was to the change the search to include the double quotes.

[florisla]

I’m not working on a fix, but here is a unit test which demonstrates the problem.

https://github.com/florisla/bump2version/tree/dont-replace-partial-matches

[florisla]

This is not very trivial to fix since the current utils.ConfiguredFile.replace() does not use regular expressions (re.sub). It’s simply serializing the search and replace text, and doing str.replace on the whole file content.