filemerge: default regular prompts to 'leave unresolved' (BC) It makes far more sense to leave these conflicts unresolved and kick back to the user than to just assume that the local version be chosen. There are almost certainly buggy scripts and applications using Mercurial in the wild that do merges or rebases non-interactively, and then assume that if the operation succeeded there's nothing the user needs to pay attention to.

filemerge: add a 'leave unresolved' option to change/delete prompts We're going to make this option the default in an upcoming patch.

filemerge: add a 'leave unresolved' option to regular prompts 'Regular' here means anything that isn't a change/delete prompt. We'll add this option to change/delete prompts in a subsequent patch.

filemerge: add debug output for whether this is a change/delete conflict Just like binary and symlink conflicts, change/delete conflicts influence the tool picked.

webcommands: test that fctx is not None in filediff() A block of code above this one already says "if fctx is not None", and it's also what this code actually intends to check, so let's be specific as PEP-8 recommends.

webcommands: stop using ersatz if-else ternary operator for rename variable 6ddc86eedc3b didn't remove it, let's do it now. Placing the added lines into the already existing "if fctx is not None" block also makes webcommands.comparison() look a bit more like webcommands.filediff(), which eases possible future refactoring. And fctx is not None only when path in ctx, so logically it's equivalent.

webcommands: get correct parents when comparing a removed file (issue4962) When comparing a file that was removed at the current revision, parents used to show grandparents instead, due to how fctx was "shifted" from the current revision to its p1. Let's not do that. The fix is pretty much copied from webcommands.filediff().

repair: use bookmarks.recordchange instead of bookmarks.write Before this patch we were using the deprecated bookmarks.write api. This patch replaces the call to bookmarks.write by a call to bookmarks.recordchange. We move the bookmark code above the code removing the undo file because with bookmarks.recordchange we have to create a transaction that would create an undo file.

commit: add amend mode for commit -i When I moved crecord into core, I didn't include the toggleAmend function (to switch from commit to amend mode). I did it because it would have made it more difficult to use record and crecord interchangably. This patch reintroduces the amend mode for commit -i as well as two tests to verify the behavior of the function.

commit: add a way to return more information from the chunkselector Before this patch, the chunkselector for record or crecord was used to return the list of hunks that were selected by the user. The goal of this series is to reintroduce the toggle amend feature for crecord. To do so, we need to be able to return more than just the selected hunks from the chunkselector but also the information: is amend mode toggled. This patch adds a new return value for chunkselectors that will be used to implement the toggle amend feature in crecord.