dispatch: make hg --profile wrap reposetup

Move profiling.maybeprofile() from _runcommand to _dispatch() so that
profiler output will include reposetup.

mercurial/dispatch.py

@@ -774,6 +774,7 b' def _dispatch(req):'
     # Check abbreviation/ambiguity of shell alias.
     shellaliasfn = _checkshellalias(lui, ui, args)
     if shellaliasfn:
+        with profiling.maybeprofile(lui):
         return shellaliasfn()
 
     # check for fallback encoding
@@ -844,7 +845,7 b' def _dispatch(req):'
     elif not cmd:
         return commands.help_(ui, 'shortlist')
 
-    if True:
+    with profiling.maybeprofile(lui):
         repo = None
         cmdpats = args[:]
         if not _cmdattr(ui, cmd, func, 'norepo'):
@@ -904,7 +905,6 b' def _dispatch(req):'
 
 def _runcommand(ui, options, cmd, cmdfunc):
     """Run a command function, possibly with profiling enabled."""
-    with profiling.maybeprofile(ui):
         try:
             return cmdfunc()
         except error.SignatureError: