desciption attribute value delimiters

Author: alexcjohnson

src/plots/cartesian/graph_interact.js

@@ -28,8 +28,8 @@ fx.layoutAttributes = {
         values: ['zoom', 'pan', 'select', 'lasso', 'orbit', 'turntable'],
         description: [
             'Determines the mode of drag interactions.',
-            '\'select\' and \'lasso\' apply only to scatter traces with',
-            'markers or text. \'orbit\' and \'turntable\' apply only to',
+            '*select* and *lasso* apply only to scatter traces with',
+            'markers or text. *orbit* and *turntable* apply only to',
             '3D scenes.'
         ].join(' ')
     },