Elide template in repr for Layout objects (#1582)

Author: jonmmease

Diff for: plotly/basedatatypes.py

@@ -411,6 +411,8 @@ def __repr__(self):
         terminal/notebook
         """
         props = self.to_plotly_json()
+
+        # Elide template
         template_props = props.get('layout', {}).get('template', {})
         if template_props:
             props['layout']['template'] = '...'
@@ -3401,6 +3403,10 @@ def __repr__(self):
                  if p in self._validators and
                  not isinstance(self._validators[p], LiteralValidator)}
 
+        # Elide template
+        if 'template' in props:
+            props['template'] = '...'
+
         # Build repr string
         repr_str = BasePlotlyType._build_repr_for_class(
             props=props,