fix comments indentation in example

Author: rutsky

_includes/themes/metromongo/frontpage.html

@@ -28,11 +28,11 @@ <h3>Simple to use</h3>
 {% highlight python %}
 from mongoengine import *                           # To define a schema for a
                                                     # document, we create a
-class Metadata(EmbeddedDocument):                  # class that inherits from
+class Metadata(EmbeddedDocument):                   # class that inherits from
     tags = ListField(StringField())                 # Document.
     revisions = ListField(IntField())
                                                     # Fields are specified by
-class WikiPage(Document):                          # adding field objects as
+class WikiPage(Document):                           # adding field objects as
     title = StringField(required=True)              # class attributes to the
     text = StringField()                            # document class.
     metadata = EmbeddedDocumentField(Metadata)