Lintian tag information: malformed-python-version (type: error)

Description (from lintian-explain-tags)

The Python-Version or Python3-Version control field is not in one of the
valid formats. It should be in one of the following:

all
current
current, >= X.Y
>= X.Y
>= A.B, << X.Y
A.B, X.Y

(One or more specific versions may be listed with the last form.) A.B and
X.Y should be Python versions.

Please refer to Python Interpreter (Section 3.4) in the Debian Python
Policy 0.12.0.0 documentation for details.

Visibility: error
Show-Always: no
Check: languages/python

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