Handle MR "show all commits" link with a doc-ready event handler.

Replaces link_to_function use which was deprecated in Rails v3.2.4.
https://github.com/rails/rails/commit/9dc57fe9c

Still absent is a graceful degrade for no-JS.

app/assets/javascripts/merge_requests.js

@@ -58,15 +58,16 @@ var MergeRequest = {
         dataType: "script"});
     }, 
 
-  showAllCommits: 
-    function() { 
-      $(".first_mr_commits").remove();
-      $(".all_mr_commits").removeClass("hide");
-    },
-
   already_cannot_be_merged:
     function(){
         $(".automerge_widget").hide();
         $(".automerge_widget.already_cannot_be_merged").show();
     }
 }
+
+$(function () {
+  $('.first_mr_commits a.show_all').live('click', function() {
+      $(".first_mr_commits").remove();
+      $(".all_mr_commits").removeClass("hide");
+    });
+});

app/views/merge_requests/_commits.html.haml

@@ -9,7 +9,7 @@
           %li.bottom
             8 of #{@commits.count} commits displayed.
             %strong
-              = link_to_function "Click here to show all", "MergeRequest.showAllCommits()"
+              %a.show_all Click here to show all
         %ul.all_mr_commits.hide.unstyled
           - @commits.each do |commit|
             = render "commits/commit", :commit => commit