fix(ngdocs): use cdn version to generate link to source files

Closes angular#3616
Closes angular#3675

Author: jamesdaily

docs/spec/sourceLinkSpec.js

@@ -20,10 +20,11 @@ describe('Docs Links', function() {
     });
 
     it('should have an "view source" button', function() {
+      spyOn(gruntUtil, 'getVersion').andReturn({cdn: '1.2.299'});
+
       expect(doc.html()).
-        toContain('<a href="http://github.com/angular/angular.js/tree/v' + gruntUtil.getVersion().number + '/test.js#L42" class="view-source btn btn-action"><i class="icon-zoom-in"> </i> View source</a>');
+        toContain('<a href="http://github.com/angular/angular.js/tree/v1.2.299/test.js#L42" class="view-source btn btn-action"><i class="icon-zoom-in"> </i> View source</a>');
     });
-
   });
 
 });

docs/src/ngdoc.js

@@ -437,7 +437,7 @@ Doc.prototype = {
     if (this.section === 'api') {
       dom.tag('a', {
           href: 'http://github.com/angular/angular.js/tree/v' +
-            gruntUtil.getVersion().number + '/' + self.file + '#L' + self.line,
+            gruntUtil.getVersion().cdn + '/' + self.file + '#L' + self.line,
           class: 'view-source btn btn-action' }, function(dom) {
         dom.tag('i', {class:'icon-zoom-in'}, ' ');
         dom.text(' View source');