ui: indent _writenobuf() to prepare moving bits from _write() functions

mercurial/ui.py

@@ -952,6 +952,7 b' class ui(object):'
     def _writenobuf(self, write, *args, **opts):
         self._progclear()
         msg = b''.join(args)
+        try:
         if self._colormode == 'win32':
             # windows color printing is its own can of crab, defer to
             # the color module and that is it.
@@ -961,6 +962,8 b' class ui(object):'
                 label = opts.get(r'label', '')
                 msg = self.label(msg, label)
             write(msg)
+        finally:
+            pass
 
     def _write(self, data):
         # opencode timeblockedsection because this is a critical path