tests: choose the path separator in PYTHONPATH suitable for platform Before this patch, test code introduced by e3a5922e18c3 into test-extension.t always uses ":" as the path separator in PYTHONPATH. But ";" should be used on Windows. This patch chooses the path separator in PYTHONPATH suitable for platform.

util: warn when adding paths ending with \ Paths ending with \ will fail the verification introduced in 684a977c2ae0 when checking out on Windows ... and if it didn't fail it would probably not do what the user expected.

check-code: more replacement characters for finding '.. note::' (even) more exact by using more characters: replace '.' with 'p' and ':' with 'q'

check-code: check comment for '.. note::' without two newlines Because string entries are replaced before matching, we must search for the transformed pattern. But it seems to be quite unique and does not return false matches. If it will, they can be listed as 3rd arg in pypats.