Change ngOnit references to ngOnInit

public/docs/ts/latest/guide/lifecycle-hooks.jade

@@ -348,7 +348,7 @@ figure.image-display
   img(src='/resources/images/devguide/lifecycle-hooks/spy-directive.gif' alt="Spy Directive")
 
 :marked
-  Adding a hero results in a new hero `<div>`. The spy's `ngOnit` logs that event.
+  Adding a hero results in a new hero `<div>`. The spy's `ngOnInit` logs that event.
   We see a new entry for each hero.
 
   The *Reset* button clears the `heroes` list. 
@@ -374,7 +374,7 @@ figure.image-display
   Constructors should do no more than set the initial local variables to simple values.
 
   When a component must start working _soon_ after creation,
-  we can count on Angular to call the `ngOnit` method to jumpstart it.
+  we can count on Angular to call the `ngOnInit` method to jumpstart it.
   That's where the heavy initialization logic belongs.
 
   Remember also that a directive's data-bound input properties are not set until _after construction_.