fix yum regexp similarly to rpm regexp in #3985
fix yum regexp similarly to rpm regexp in #3985

this is a "nope, aint got time to test this one" PR.

this affects a code path that is only for localinstalls and doesn't have
any existing tests.

i've already exceeded my 5 minute timebox for fixing the problem.

i'm more likely to rewrite the yum provider from scratch and shitcan the
unit tests in their entirety than to reuse any work that i do here so
any time spent on carefully testing this is likely to end up wasted.

Signed-off-by: Lamont Granquist <0ab8dc438f73addc98d9ad5925ec8f2b97991703@scriptkiddie.org>

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