Missing keyword in string formatter (just not assigned)

Author: theengineear

plotly/graph_objs/graph_objs_tools.py

@@ -211,7 +211,7 @@ def curtail_val_repr(val, max_chars, add_delim=False):
             # TODO: can we assume this ends in "'"
             r = r[:max_chars - len(end + "'")] + end + "'"
         elif (isinstance(val, list) and
-              max_chars >= len("[{end}]".format(end))):
+              max_chars >= len("[{end}]".format(end=end))):
             r = r[:max_chars - len(end + ']')] + end + ']'
         else:
             r = r[:max_chars - len(end)] + end