diff --git a/src/core.js b/src/core.js
index 3389e83f..3c7572fe 100644
--- a/src/core.js
+++ b/src/core.js
@@ -726,6 +726,7 @@ jQuery.extend({
 			}
 		}
 
+		// Flatten any nested arrays
 		return ret.concat.apply( [], ret );
 	},