Core: Fix comments for .get() method

Closes gh-1547

AUTHORS.txt

@@ -217,3 +217,5 @@ Christopher Jones <chris@cjqed.com>
 Forbes Lindesay <forbes@lindesay.co.uk>
 S. Andrew Sheppard <andrew@wq.io>
 Roman Reiß <me@silverwind.io>
+Benjy Cui <benjytrys@gmail.com>
+

src/core.js

@@ -57,10 +57,10 @@ jQuery.fn = jQuery.prototype = {
 	get: function( num ) {
 		return num != null ?
 
-			// Return a 'clean' array
+			// Return just the one element from the set
 			( num < 0 ? this[ num + this.length ] : this[ num ] ) :
 
-			// Return just the object
+			// Return all the elements in a clean array
 			slice.call( this );
 	},