docstring: specify padding is in px

Author: emilykl

src/components/shapes/attributes.js

@@ -301,7 +301,7 @@ module.exports = templatedArray('shape', {
             dflt: 3,
             min: 0,
             editType: 'arraydraw',
-            description: 'Sets padding between edge of label and xanchor / yanchor.'
+            description: 'Sets padding (in px) between edge of label and xanchor / yanchor.'
         },
         editType: 'arraydraw'
     },

src/components/shapes/draw_newshape/attributes.js

@@ -154,7 +154,7 @@ module.exports = {
                 dflt: 3,
                 min: 0,
                 editType: 'none',
-                description: 'Sets padding between edge of label and xanchor / yanchor.'
+                description: 'Sets padding (in px) between edge of label and xanchor / yanchor.'
             },
             editType: 'none'
         },

test/plot-schema.json

@@ -3597,7 +3597,7 @@
       }
      },
      "padding": {
-      "description": "Sets padding between edge of label and xanchor / yanchor.",
+      "description": "Sets padding (in px) between edge of label and xanchor / yanchor.",
       "dflt": 3,
       "editType": "none",
       "min": 0,
@@ -7218,7 +7218,7 @@
         }
        },
        "padding": {
-        "description": "Sets padding between edge of label and xanchor / yanchor.",
+        "description": "Sets padding (in px) between edge of label and xanchor / yanchor.",
         "dflt": 3,
         "editType": "arraydraw",
         "min": 0,