another typo in comment

mmllib/mml.py

@@ -181,7 +181,7 @@ def _getint(macro, minval, maxval, defval):
 def mml(macro, _nplay=None, _barline=None, _mmltrk=None):
     """ Parse a string in the "music macro language"
 
-    The rsulting playlist is ordinarily a list of (frequency, duration)
+    The resulting playlist is ordinarily a list of (frequency, duration)
     tuples, but the two overridable functions are the only ones modifying
     it, so it can be anything these do.