docs(dateFilter): correct example for date 'fullDate filter'

The equivalent expanded example for 'fullDate' is given as 'EEEE, MMMM d,y'
whereas it should be 'EEEE, MMMM d, y'. With added whitespace.

Closes angular#7350

Author: Joe Pettersson

src/ng/filter/filters.js

@@ -338,7 +338,7 @@ var DATE_FORMATS_SPLIT = /((?:[^yMdHhmsaZEw']+)|(?:'(?:[^']|'')*')|(?:E+|y+|M+|d
  *   * `'medium'`: equivalent to `'MMM d, y h:mm:ss a'` for en_US locale
  *     (e.g. Sep 3, 2010 12:05:08 pm)
  *   * `'short'`: equivalent to `'M/d/yy h:mm a'` for en_US  locale (e.g. 9/3/10 12:05 pm)
- *   * `'fullDate'`: equivalent to `'EEEE, MMMM d,y'` for en_US  locale
+ *   * `'fullDate'`: equivalent to `'EEEE, MMMM d, y'` for en_US  locale
  *     (e.g. Friday, September 3, 2010)
  *   * `'longDate'`: equivalent to `'MMMM d, y'` for en_US  locale (e.g. September 3, 2010)
  *   * `'mediumDate'`: equivalent to `'MMM d, y'` for en_US  locale (e.g. Sep 3, 2010)