Module::Install::Share's POD has a TO DO section which describes:
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Currently install_share installs not only the files you want, but if
called by the author will also copy .svn and other source-control
directories, and other junk.
Enhance this to copy only files under share that are in the MANIFEST, or
possibly those not in MANIFEST.SKIP.
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However, since ishigaki fixed bug:
https://rt.cpan.org/Public/Bug/Display.html?id=17893
This is no longer true and should be removed from the POD. Otherwise
people who follow the POD (like myself) will be left scratching their
heads and running tests wondering why it isn't just copying everything
from the share folder. At least until they look at the source code and
see that things have changed.
I would supply a patch but it's probably easier for you to just delete
the lines.
Lyle