2to3 equivalent to --fix=tuple_params

I hope I got this all right...
diff --git a/Lib/fontTools/ttLib/tables/BitmapGlyphMetrics.py b/Lib/fontTools/ttLib/tables/BitmapGlyphMetrics.py
index 71514e1..74013fa 100644
--- a/Lib/fontTools/ttLib/tables/BitmapGlyphMetrics.py
+++ b/Lib/fontTools/ttLib/tables/BitmapGlyphMetrics.py
@@ -37,7 +37,7 @@
 		writer.endtag(self.__class__.__name__)
 		writer.newline()
 
-	def fromXML(self, (name, attrs, content), ttFont):
+	def fromXML(self, name, attrs, content, ttFont):
 		metricNames = set(sstruct.getformat(self.__class__.binaryFormat)[1])
 		for element in content:
 			if type(element) != TupleType: