merge: use util.unlinkpath for removing moved files - more like how removed files are removed.

merge: .hgsubstate is special as merge destination, not as merge source

merge: remove redundant unlink after merge The early prescan for move/remove and removal of moved files in applyupdates was introduced with mergestate 368a4ec603cc and rendered this chunk of code irrelevant. The impact of the chunk was reduced in 5b3383ea67d2 - but it could have been removed completely.

merge: rename list of actions from action to actions

merge: consistently use "x" instead of 'x' for internal action types This makes it simpler to search for places where the action types are handled.

merge: consistently use repo.wopener.audit instead of creating a new auditor

scmutil: simplify vfs.audit - drop wrapped vfs.auditor

util: copyfile: remove dest before copying This prevents spurious problems writing to locked files on Windows.

merge: warn when internal:merge cannot merge symlinks A follow-up to d084df89d948. internal:merge should never be picked for merging symlinks ... but in the test suite we have HGMERGE="internal:merge" which bypasses all the usual merge-tool cleverness. Without any output it can be hard to figure out what happened and where the problem is.

merge with stable