Fix typo in groupby style doc string

rreusser · rreusser · commit 49e24ad1ec4c · 2017-03-10T14:46:28.000-05:00
diff --git a/src/transforms/groupby.js b/src/transforms/groupby.js
@@ -50,7 +50,7 @@ exports.attributes = {
             description: [
                 'Sets each group style.',
                 'For example, with `groups` set to *[\'a\', \'b\', \'a\', \'b\']*',
-                'and `style` set to *[{target: \'a\': { marker: { color: \'red\' } }}]',
+                'and `style` set to *[{target: \'a\', value: { marker: { color: \'red\' } }}]',
                 'marker points in group *\'a\'* will be drawn in red.'
             ].join(' ')
         },
