merge with stable

templater: enable alias predicates to be used in "revset()" function Before this patch, predicates defined in "[revsetalias]" can't be used in the query specified to template function "revset()", because: - "revset()" uses "localrepository.revs()" to get query result, but - "localrepository.revs()" passes "None" as "ui" to "revset.match()", then - "revset.match()" can't recognize any alias predicates To enable alias predicates to be used in "revset()" function, this patch invokes "revset.match()" directly with "repo.ui". This patch doesn't make "localrepository.revs()" pass "self.ui" to "revset.match()", because this may be intentional implementation to prevent alias predicates from shadowing built-in ones and breaking functions internally using "localrepository.revs()". Even if it isn't intentional one, the check for shadowing should be implemented (maybe on default branch) before fixing it for safety.

import: show the warning message for failure of merging Before this patch, no message is shown for failure of merging at "hg import". In such case, merging patch is imported as a normal revision silently, and it may confuse users. For simplicity, this patch recommends just using "--exact", even though importing the merging patch itself is possible without it if: - the hash of the 1st parent in the patch is equal to one of the patch imported just before (or the parent of the working directory, for the 1st patch of the series), and - the hash of the 2nd parent in the patch is known in the local repository