Fix broken link to proxy artists documentation

deepyaman · web-flow · commit 91e120886627 · 2017-10-10T07:26:22.000-05:00
http://matplotlib.org/users/legend_guide.html#using-proxy-artist refers to a named anchor that is unavailable.
diff --git a/lib/matplotlib/legend.py b/lib/matplotlib/legend.py
@@ -616,11 +616,12 @@ def _init_legend_box(self, handles, labels, markerfirst=True):
         for orig_handle, lab in zip(handles, labels):
             handler = self.get_legend_handler(legend_handler_map, orig_handle)
             if handler is None:
+                fragment = "#creating-artists-specifically-for-adding-to-the-legend-aka-proxy-artists"
                 warnings.warn(
                     "Legend does not support {!r} instances.\nA proxy artist "
                     "may be used instead.\nSee: "
                     "http://matplotlib.org/users/legend_guide.html"
-                    "#using-proxy-artist".format(orig_handle)
+                    "{}".format(orig_handle, fragment)
                 )
                 # We don't have a handle for this artist, so we just defer
                 # to None.
