Add missing article

kgryte · kgryte · commit d754754a98d5 · 2017-07-24T18:23:03.000-07:00
diff --git a/lib/node_modules/@stdlib/utils/group/README.md b/lib/node_modules/@stdlib/utils/group/README.md
@@ -35,7 +35,7 @@ var out = group( arr, groups );
 
 The function accepts the following `options`:
 
-* `returns`: specifies the output format. If the option equals `'values'`, the function outputs element values. If option equals `'indices'`, the function outputs element indices. If the option equals `'*'`, the function outputs both element indices and values. Default: `'values'`.
+* `returns`: specifies the output format. If the option equals `'values'`, the function outputs element values. If the option equals `'indices'`, the function outputs element indices. If the option equals `'*'`, the function outputs both element indices and values. Default: `'values'`.
 
 By default, the function returns element values. To return element indices, set the `returns` option to `'indices'`.
 
