chore(docs): fix jscs error

Removed a triling whitespace

src/ng/directive/select.js

@@ -71,7 +71,7 @@ var ngOptionsMinErr = minErr('ngOptions');
  *     * `select` **`as`** `label` **`for`** `value` **`in`** `array`
  *     * `label` **`group by`** `group` **`for`** `value` **`in`** `array`
  *     * `label` **`group by`** `group` **`for`** `value` **`in`** `array` **`track by`** `trackexpr`
- *     * `label` **`for`** `value` **`in`** `array` | orderBy:`orderexpr` **`track by`** `trackexpr` 
+ *     * `label` **`for`** `value` **`in`** `array` | orderBy:`orderexpr` **`track by`** `trackexpr`
  *        (for including a filter with `track by`)
  *   * for object data sources:
  *     * `label` **`for (`**`key` **`,`** `value`**`) in`** `object`