[python][patch] i8n replacement/capitalize/full sentences on Python error messages.

[Tom Tromey]

>>>>> "Phil" == Phil Muldoon <pmuldoon@redhat.com> writes:

Phil> During a recent review we caught some messages that were not written
Phil> enclosed with _() and therefore would not allow for
Phil> internationalization.  I decided to audit the rest of the code, and
Phil> found a few more.

Thanks!

Phil> This patch converts those error strings. Additionally, in some
Phil> cases, I added capitalization and punctuation.  This patch is
Phil> largely mechanical and obvious, but I did not commit under the
Phil> obvious rule as it pretty much touches every file in the Python
Phil> section.

Phil> OK?

I skimmed it and it seems fine.
Please check this in.

Tom