Handle 'none' as color and edgecolor for bar()

Hi,

Update to my recent email: perhaps it would make sense to handle the
'color' argument in the same way, allowing hollow bars. Combined patch
below.

Ben.

--- ORIG-axes.py 2010-07-06 15:43:35.000000000 +0100
+++ NEW-axes.py 2010-08-09 09:39:44.000256000 +0100
@@ -4575,15 +4575,17 @@
         if len(linewidth) < nbars:
             linewidth *= nbars

- if color is None:
- color = [None] * nbars
+ if (color is None
+ or (is_string_like(color) and color.lower() == 'none')):
+ color = [color] * nbars
         else:
             color = list(mcolors.colorConverter.to_rgba_array(color))
             if len(color) < nbars:
                 color *= nbars

- if edgecolor is None:
- edgecolor = [None] * nbars
+ if (edgecolor is None
+ or (is_string_like(edgecolor) and edgecolor.lower() == 'none')):
+ edgecolor = [edgecolor] * nbars
         else:
             edgecolor = list(mcolors.colorConverter.to_rgba_array(edgecolor))
             if len(edgecolor) < nbars: