docs(ngHideShow): Add a list of falsy values

src/ng/directive/ngShowHide.js

@@ -52,6 +52,12 @@
  *
  * Just remember to include the important flag so the CSS override will function.
  *
+ * ### Falsy values
+ * 
+ * Here is a list of values that ngShow will consider as a falsy value (case insensitive):
+ * 
+ * `f` / `0` / `false` / `no` / `n` / `[]`
+ * 
  * ## A note about animations with ngShow
  *
  * Animations in ngShow/ngHide work with the show and hide events that are triggered when the directive expression
@@ -200,6 +206,12 @@ var ngShowDirective = ['$animate', function($animate) {
  * </pre>
  *
  * Just remember to include the important flag so the CSS override will function.
+ * 
+ * ### Falsy values
+ * 
+ * Here is a list of values that ngHide will consider as a falsy value (case insensitive):
+ * 
+ * `f` / `0` / `false` / `no` / `n` / `[]`
  *
  * ## A note about animations with ngHide
  *