transplant: change "editform" to distinguish merge commits from others "editform" argument for "getcommiteditor" is decided according to the format below: EXTENSION[.COMMAND][.ROUTE] - EXTENSION: name of extension - COMMAND: name of command, if there are two or more commands in EXTENSION - ROUTE: name of route, if there are two or more routes in COMMAND This patch newly adds "normal" and "merge" as ROUTE, to distinguish merge commits from other. This patch adds 4 test patterns to test combination of "merge"(x2) and "--continue"(x2).