rebase: pass 'editform' argument to 'cmdutil.getcommiteditor'

This patch passes 'editform' argument 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

In this patch:

  - COMMAND is omitted
  - 'normal' and 'collapse' are used as ROUTE

hgext/rebase.py

@@ -138,7 +138,7 b' def rebase(ui, repo, **opts):'
     skipped = set()
     targetancestors = set()
 
-    editor = cmdutil.getcommiteditor(**opts)
+    editor = cmdutil.getcommiteditor(editform='rebase.normal', **opts)
 
     lock = wlock = None
     try:
@@ -383,7 +383,8 b' def rebase(ui, repo, **opts):'
                 for rebased in state:
                     if rebased not in skipped and state[rebased] > nullmerge:
                         commitmsg += '\n* %s' % repo[rebased].description()
-                editor = cmdutil.getcommiteditor(edit=True)
+                editform = 'rebase.collapse'
+                editor = cmdutil.getcommiteditor(edit=True, editform=editform)
             newrev = concludenode(repo, rev, p1, external, commitmsg=commitmsg,
                                   extrafn=extrafn, editor=editor)
             for oldrev in state.iterkeys():