api-builder: remove unwanted whitespace from directive template

tools/api-builder/angular.io-package/templates/directive.template.html

@@ -2,7 +2,7 @@
 {% include "lib/paramList.html" -%}
 {% extends 'class.template.html' -%}
 
-{% block additional %}
+{% block additional -%}
 .l-main-section
   h2 Selectors
   .l-sub-section
@@ -20,8 +20,7 @@
       |  bound to 
       code {$ property.memberDoc.classDoc.name $}.{$ property.propertyName $}
     :markdown
-{$ property.memberDoc.description | indentForMarkdown(2) | trimBlankLines $}
-  {% endfor %}
+{$ property.memberDoc.description | indentForMarkdown(2) | trimBlankLines $}{% endfor %}
 {% endif %}
 
 {% if doc.outputs %}