polib: remove unnecessary comparisons with True
Submitted to upstream repository as changeset
f11e0b1b37b0.
subrepo: lazier git push logic
Avoids calls to git push when the revision is already known to be
in the remote repository. Now, when using a read-only git subrepo,
git will never need to talk to its upstream repository.
check-code: catch Python 'is' comparing number or string literals
The Python 'is' operator compares object identity, so it should
definitely not be applied to string or number literals, which Python
implementations are free to represent with a temporary object.
This should catch the following kinds of bogus expressions (examples):
x is 'foo' x is not 'foo'
x is "bar" x is not "bar"
x is 42 x is not 42
x is -36 x is not -36
As originally proposed by Martin Geisler, amended with catching
negative numbers.