metaedit: check for public changeset before instability Public changeset will stay public even if the selection is adjusted, this is a more definitive condition that is worth warning about first.

fold: move sanity check after locking Checking for operation validaty without the locks open us to race condition.

metaedit: add support for folding commits while editing their metadata This also allows us to accept multiple commits without dealing with the thorny algorithmic and UI issues of editing multiple commits at once. Crucially, it is different from 'hg fold --exact' in that it also allows 'folding' a single commit and rewriting its metadata. This is really useful to have as a single logical operation, for example while preparing a series of multiple local changesets that will need to be pushed as a single changeset.

commands: introduce a new command to edit commit metadata This patch introduces metaedit, a command to metadata of a set of revisions without updating the working copy. This is particularly relevant for repositories where changing the parent of the working copy is time-consuming. We could add more stack manipulation operations to metaedit in the future.

evolve: factor out check for creating unstable commits This check is pretty non-trivial, and we do it in two places already. We're going to do it in a third place soon.

evolve: factor out sanity checks for folds We're going to use the same checks in another context in an upcoming patch.

evolve: include node, rev, desc, and phase in list

evolve: use hex in list output

py3: use items() instead of iteritems()

py3: change except from two comma to as notation

py3: tolerate io/StringIO divergence

split: rewrite the pre-split commit message I find this wording slightly clearer.

open mercurial-3.7 compat branch

readme: add various missing parts

hgignore: add an ignore rule for test timing Modern tests runner store a record of last test run timing. We properly ignore it.

tests: change quoting pattern to match core's conventions This patch modifies two tests to match new quoting patterns used in core: (use "hg config --edit" to set your username) becomes (use 'hg config --edit' to set your username) and (use hg resolve and hg graft --continue) becomes (use 'hg resolve' and 'hg graft --continue')

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