mention that 'width' is in data coordinates

Author: etpinard

src/traces/box/attributes.js

@@ -179,9 +179,9 @@ module.exports = {
         dflt: 0,
         editType: 'calc',
         description: [
-            'Sets the width of the box.',
+            'Sets the width of the box in data coordinate',
             'If *0* (default value) the width is automatically selected based on the positions',
-            'of other box traces in the same subplot.',
+            'of other box traces in the same subplot.'
         ].join(' ')
     },
 

src/traces/violin/attributes.js

@@ -138,7 +138,7 @@ module.exports = {
 
     width: extendFlat({}, boxAttrs.width, {
         description: [
-            'Sets the width of the violin.',
+            'Sets the width of the violin in data coordinates.',
             'If *0* (default value) the width is automatically selected based on the positions',
             'of other violin traces in the same subplot.',
         ].join(' ')