division_{support,trace}: fix documentation

my2to3/fixes/fix_division_support.py

@@ -9,7 +9,7 @@ from my2to3.util import add_future, data2types
 
 
 class FixDivisionSupport(BaseSupportFix):
-  """Rewrites division_traced(n, a, b) into Py2/Py3-compatible division
+  """Rewrites division_traced(..., a, b) into Py2/Py3-compatible division
   """
   basename = "division"
 

my2to3/fixes/fix_division_trace.py

@@ -9,7 +9,7 @@ from my2to3.util import parse_type
 
 
 class FixDivisionTrace(BaseDynamicTraceFix):
-  """Rewrites a / b into division_traced(id, a, b)
+  """Rewrites a / b into division_traced(..., a, b)
   """
   basename = "division"
   traced_information = "dividend_type", "divisor_type"