apply #14022 without semicolon – cleans up some jquery class usage

js/collapse.js

@@ -88,8 +88,7 @@
 
     this.$element
       .addClass('collapsing')
-      .removeClass('collapse')
-      .removeClass('in')
+      .removeClass('collapse in')
 
     this.transitioning = 1
 
@@ -110,7 +109,7 @@
   }
 
   Collapse.prototype.toggle = function () {
-    this[this.$element.hasClass('in') ? 'hide' : 'show']()
+    $this.toggleClass('collapsed', $target.hasClass('in'))
   }