tests: add test of uncommit with default phase as secret We didn't seem to have any test checking that uncommitting a draft commit with phase.new-phase=secret preserved the draft phase. Differential Revision: https://phab.mercurial-scm.org/D3817

grep: add --diff flag Adds a diff flag, which works exactly same as all, in fact since --all searches diffs, there diff is a better name for it. The all flag is still here for backward compatibility reasons. Some major tests for all has been picked and added for diff. Differential Revision: https://phab.mercurial-scm.org/D3763

fix: include cleanupnodes() in transaction As pointed out by Yuya, we need a transaction to make sure the state before the call to cleanupnodes() is not observable. Differential Revision: https://phab.mercurial-scm.org/D3823

progress: enforce use of complete() on the helper class complete() is preferred over update(None), so let's enforce that. Differential Revision: https://phab.mercurial-scm.org/D3822

progress: extract function for closing topic progress(None) had a completely different implementation from the progress(<not None>) implementation. It very much feels like it should be a separate method, so this patch makes it so. That also makes it clear that only the topic parameter matters when closing a topic (e.g. "total" does not matter). Differential Revision: https://phab.mercurial-scm.org/D3821

progress: use context manager for lock Differential Revision: https://phab.mercurial-scm.org/D3820