doc: remove .strip() for a docstring This shouldn't be necessary, and by stripping it (and removing the trailing newline) it causes issues with Mercurial's doc/gendoc.py's RST output, since there's no newline separating this string and the thing that comes after it. I believe that the `.strip()` has been in there since the beginning, but I have not found a reason for its existence. It's possible that this was required in older Mercurial versions, but is no longer required? Notably, the tests (which include an invocation of `hg help evolution`) still pass with this change. ### Alternatives considered - Making gendoc.py robust against this. This was rejected since there's no need for the .strip() as far as I can tell, and this is the only case I know of that would need such logic.