Invoke callback after after-highlight hook (#1588)

Previously, `callback`, as passed to `Prism.highlightElement`, would get called before
all of the hooks had been run. This moves it after all the hooks, so it can truly be considered
a "complete" callback.

This could be a breaking change for any userland modifications that were expecting `callback`
to fire before plugins, but we expect this change to mostly conform with user expectations and
consider this a bugfix..

components/prism-core.js

@@ -249,9 +249,9 @@ var _ = _self.Prism = {
 
 				env.element.innerHTML = env.highlightedCode;
 
-				callback && callback.call(env.element);
 				_.hooks.run('after-highlight', env);
 				_.hooks.run('complete', env);
+				callback && callback.call(env.element);
 			};
 
 			worker.postMessage(JSON.stringify({
@@ -267,10 +267,11 @@ var _ = _self.Prism = {
 
 			env.element.innerHTML = env.highlightedCode;
 
-			callback && callback.call(element);
-
 			_.hooks.run('after-highlight', env);
+
 			_.hooks.run('complete', env);
+
+			callback && callback.call(element);
 		}
 	},
 

prism.js

@@ -254,9 +254,9 @@ var _ = _self.Prism = {
 
 				env.element.innerHTML = env.highlightedCode;
 
-				callback && callback.call(env.element);
 				_.hooks.run('after-highlight', env);
 				_.hooks.run('complete', env);
+				callback && callback.call(env.element);
 			};
 
 			worker.postMessage(JSON.stringify({
@@ -272,10 +272,11 @@ var _ = _self.Prism = {
 
 			env.element.innerHTML = env.highlightedCode;
 
-			callback && callback.call(element);
-
 			_.hooks.run('after-highlight', env);
+
 			_.hooks.run('complete', env);
+
+			callback && callback.call(element);
 		}
 	},
 
@@ -684,6 +685,7 @@ if (Prism.languages.markup) {
 	}, Prism.languages.markup.tag);
 }
 
+
 /* **********************************************
      Begin prism-clike.js
 ********************************************** */
@@ -889,4 +891,4 @@ Prism.languages.js = Prism.languages.javascript;
 
 	document.addEventListener('DOMContentLoaded', self.Prism.fileHighlight);
 
-})();
+})();