Unindented inclusion of +article fragment because it added extra whitespace to <pre> code blocks

BUG=none

Review URL: https://codereview.chromium.org/149543003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247900 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/docs/templates/private/article.html

@@ -9,7 +9,10 @@
        platformTitle:platformTitle}}
 <article class="article-content">
   <div itemprop="articleBody">
-    {{+article platform:platform platformTitle:platformTitle /}}
+
+{{- This is unindented because it may contain whitespace-sensitive tags. -}}
+{{+article platform:platform platformTitle:platformTitle /}}
+    
     {{+partials.cc /}}
     <nav class="inline-toc no-permalink">
       {{+partials.relatedpages_items items:sidenavs.related /}}