FIX: use lowercase in map

tacaswell · tacaswell · commit 9963ccadc26e · 2016-03-06T23:56:41.000-05:00
ColorConverter lowercases everything on the way in.
diff --git a/lib/matplotlib/_color_data.py b/lib/matplotlib/_color_data.py
@@ -964,11 +964,11 @@
 # normalize to names with no spaces and provide versions with XKCD
 # prefix.
 for k in list(XKCD_COLORS):
-    XKCD_COLORS['XKCD'+k] = XKCD_COLORS[k]
+    XKCD_COLORS['xkcd'+k] = XKCD_COLORS[k]
     _k = k.replace(' ', '')
     if _k != k:
         XKCD_COLORS[_k] = XKCD_COLORS[k]
-        XKCD_COLORS['XKCD'+_k] = XKCD_COLORS[k]
+        XKCD_COLORS['xkcd'+_k] = XKCD_COLORS[k]
 
 
 # https://drafts.csswg.org/css-color-4/#named-colors
