docs(guide/Filters): add title for consistency

greggunner · Narretz · commit db1cf6d29317 · 2016-02-28T15:13:01.000+01:00
Closes angular#14143
diff --git a/docs/content/guide/filter.ngdoc b/docs/content/guide/filter.ngdoc
@@ -3,6 +3,8 @@
 @sortOrder 280
 @description
 
+# Filters
+
 A filter formats the value of an expression for display to the user. They can be used in view templates,
 controllers or services and it is easy to define your own filter.
 
