description updates

Author: monfera

src/traces/parcoords/attributes.js

@@ -119,7 +119,18 @@ module.exports = {
                 autocolorscale: extendDeep(
                     {},
                     colorAttributes('line').autocolorscale,
-                    {dflt: false}
+                    {
+                        dflt: false,
+                        description: [
+                            'Has an effect only if line.color` is set to a numerical array.',
+                            'Determines whether the colorscale is a default palette (`autocolorscale: true`)',
+                            'or the palette determined by `line.colorscale`.',
+                            'In case `colorscale` is unspecified or `autocolorscale` is true, the default ',
+                            'palette will be chosen according to whether numbers in the `color` array are',
+                            'all positive, all negative or mixed.',
+                            'The default value is false, so that `parcoords` colorscale can default to `Viridis`.'
+                        ].join(' ')
+                    }
                 )
 
             }
@@ -131,7 +142,7 @@ module.exports = {
                 role: 'info',
                 dflt: false,
                 description: [
-                    'Has an effect only if `marker.color` is set to a numerical array.',
+                    'Has an effect only if `line.color` is set to a numerical array.',
                     'Determines whether or not a colorbar is displayed.'
                 ].join(' ')
             },

src/traces/parcoords/index.js

@@ -24,7 +24,7 @@ Parcoords.meta = {
     description: [
         'Parallel coordinates for multidimensional exploratory data analysis.',
         'The samples are in `data`.',
-        'The colors are set in `colors`.'
+        'The colors are set in `line.color`.'
     ].join(' ')
 };