Fix grammar of Vega cmap deprecation message.

QuLogic · QuLogic · commit a8a769d16143 · 2017-01-29T23:57:58.000-05:00
Once all the parameters are substituted into the warning message, it
doesn't make grammatical sense due to some assumptions in the message.
diff --git a/lib/matplotlib/_cm.py b/lib/matplotlib/_cm.py
@@ -1384,11 +1384,11 @@ def __getitem__(self, key):
                      "Vega20b_r", "Vega20c", "Vega20c_r"]:
             warn_deprecated(
                 "2.0",
-                name="Vega colormaps",
-                alternative="tab",
+                name=key,
+                alternative="tab" + key[4:],
                 obj_type="colormap"
                 )
- 
+
         return super(_deprecation_datad, self).__getitem__(key)
 
 
