Clearly note where code duplication exists
Clearly note where code duplication exists

The duplication of this code isn't really that bad, but saying
"pip check" makes it ambigous which file is relevant. Changing to
reference the exact filename makes this clearer.

sbidoul/pip,sbidoul/pip,pfmoore/pip,pfmoore/pip,pradyunsg/pip,pradyunsg/pip,pypa/pip,pypa/pip