Fix display in identity API docs

Author: nickstenning

doc/api/identity.rst

@@ -4,6 +4,7 @@ annotator.identity package
 ==========================
 
 ..  function:: annotator.identity.simple()
+    
     A module that configures and registers an instance of
     :class:`annotator.identity.SimpleIdentityPolicy`.
 

src/identity.js

@@ -8,6 +8,7 @@ var SimpleIdentityPolicy;
 
 /**
  * function:: simple()
+ *
  * A module that configures and registers an instance of
  * :class:`annotator.identity.SimpleIdentityPolicy`.
  */