prepush: backed out refactoring It has some problems in corner cases and will fail on a test recently introduced on stable. Will maybe be reintroduced later, in a better version.

prepush: add more test cases

prepush: fix bug in warning message selection In certain situations you would be told "you should pull and merge" even when there is nothing to pull.

merge with stable

verify: improve progress descriptions For GUIs, the progress bar is disconnected visually from the text that is output by ui.write(), so it's better to be a little bit redundant in naming the status. "checking" is redundant, since the user is running the verify command. 'changesets', 'manifests', etc, tell the user what is being checked (the entity being counted in the progress bar.

pylint, pyflakes: remove unused or duplicate imports

Fix --blacklist when --jobs > 1 in run_tests.py. The options parsing logic replaces the options.blacklist initial value, a list of filenames, with a dict of test names to filenames. When runchildren rebuilds the command line to launch child processes the dict is flattened and provided as a malformed argument when a filename is expected. Fix is to remove the blacklist option from child invocations since the filtering is handled in the parent anyway.

merge with stable

run-tests.py: reset env variables set by hooks

checklink: use an explicit prefix for the temporary file