Fixed optional spec in the docs.

Author: jgeewax

docs/site/components/docs/docs.js

@@ -159,7 +159,6 @@ angular
                       formatHtml(detectLinks(detectModules(tag.description.replace(/^- /, '')))));
                   tag.types = $sce.trustAsHtml(tag.types.reduceRight(
                       reduceModules, []).join(', '));
-                  tag.optional = tag.types.toString().indexOf('=') > -1;
                   tag.subparam = tag.name.indexOf('.') > -1;
                   return tag;
                 }),

docs/site/css/main.css

@@ -747,10 +747,11 @@ ul {
   font-style: italic;
 }
 
-.param-optional .param-description:before {
-  content: "optional. ";
+.param-optional .param-types:after {
+  content: " (optional)";
   color: #aaa;
   font-style: italic;
+  font-size: 85%;
 }
 
 .method-heading {