Remove another spurious diff

Author: kwankyu

src/sage/rings/polynomial/groebner_fan.py

@@ -1234,7 +1234,7 @@ def homogeneity_space(self):
             return h
 
     def render(self, file=None, larger=False, shift=0, rgbcolor=(0, 0, 0),
-               polyfill=max_degree, scale_colors=True):
+               polyfill=True, scale_colors=True):
         """
         Render a Groebner fan as sage graphics or save as an xfig file.
 
@@ -1262,7 +1262,7 @@ def render(self, file=None, larger=False, shift=0, rgbcolor=(0, 0, 0),
         -  ``rgbcolor`` -- This will not affect the saved xfig
            file, only the sage graphics produced.
 
-        -  ``polyfill`` -- Whether or not to fill the cones with
+        -  ``polyfill`` -- (default: ``True``) Whether or not to fill the cones with
            a color determined by the highest degree in each reduced Groebner
            basis for that cone.
 
@@ -1295,6 +1295,8 @@ def render(self, file=None, larger=False, shift=0, rgbcolor=(0, 0, 0),
             ...
             NotImplementedError
         """
+        if polyfill is True:
+            polyfill = max_degree
         S = self.__ring
         if S.ngens() < 3:
             print("For 2-D fan rendering the polynomial ring must have 3 variables (or more, which are ignored).")