leading zeroes can fail to be coerced about python-semanticversion

[rbarrois]

Thanks for the feedback!

I agree that .coerce() should not fail on that input; however, 000 does not match clause 9 of the spec: numeric identifiers in a pre-release version must not contain leading zeroes.

A good test value would be:

>>> Version.coerce("01.02.03-04.0a.000023.000bcd+05")
Version("1.2.3-4.0a.23.000bcd+05")

• The build metadata is untouched (leading zeroes are allowed);
• Numerical identifiers in the pre-release part have their leading zeroes stripped;
• Non-numerical identifiers in that pre-release part are untouched.

I guess the code should instead look like this:

if prerelease:
  clean_prerelease = ".".join([
    bit.lstrip("0") or "0" if bit.isdigit() else bit
    for bit in prerelease.split(".")
  ])
  version = "%s-%s" % (version, clean_prerelease)