Fix README formatting, typos

README.rst

@@ -181,4 +181,5 @@
 Each entry is key-value pair of a dict where the key is a (prefix, suffix) tuple and the value a dict containing the following:
 
 ``model`` the name of the referenced dimension model (doesn't do anything special)
+
 ``type`` a field class, the field type to use
@@ -184,2 +185,3 @@
 ``type`` a field class, the field type to use
+
 ``default`` default value for the fields
@@ -185,2 +187,3 @@
 ``default`` default value for the fields
+
 ``args`` list of arguments to inject in ``type`` constructor
@@ -186,4 +189,5 @@
 ``args`` list of arguments to inject in ``type`` constructor
+
 ``kwargs`` dict of keyword arguments to inject in ``type`` constructor.
 
 Here is declaration that will create fields with the names ``a1_b``, ``a2_b``, ``a3_b``, ...
@@ -202,7 +206,7 @@
         'default': True,
         'args': ("field is optional"),
         'kwargs': dict(required=True),
-    a,}
+    }
  }
 
 Validation hook for analytic fields