Regenerate and fix docs

Author: Jon Wayne Parrott

packages/google-auth/docs/reference/google.auth.app_engine.rst

@@ -0,0 +1,7 @@
+google.auth.app_engine module
+=============================
+
+.. automodule:: google.auth.app_engine
+    :members:
+    :inherited-members:
+    :show-inheritance:

packages/google-auth/docs/reference/google.auth.rst

@@ -19,6 +19,7 @@ Submodules
 
 .. toctree::
 
+   google.auth.app_engine
    google.auth.credentials
    google.auth.crypt
    google.auth.environment_vars

packages/google-auth/google/oauth2/service_account.py

@@ -205,7 +205,7 @@ def from_service_account_file(cls, filename, **kwargs):
         return cls._from_signer_and_info(signer, info, **kwargs)
 
     def to_jwt_credentials(self):
-        """Creates a :cls:`google.auth.jwt.Credentials` instance from this
+        """Creates a :class:`google.auth.jwt.Credentials` instance from this
         instance.
 
         The new instance will use the same private key as this instance and