fixed test

Author: emmanuelle

packages/python/plotly/_plotly_utils/tests/validators/test_colorscale_validator.py

@@ -25,6 +25,8 @@ def validator():
     and len(c) == 2
     and isinstance(c[0], str)
     and isinstance(c[1], list)
+    and not c[0].endswith('_r')
+    and not c[0].startswith('_')
 }