Fix minor typos in the README

README.rst

@@ -110,7 +110,7 @@ Each service supporting SSO must provide support for two special URLs:
   credentials. This handler should return an HTML page containing just
   the text "OK".
 
-The login server supports these two parameters:
+The login server supports the following parameters:
 
 *s* - Service name
   Note that all service names should end with a slash. The
@@ -140,7 +140,7 @@ An SSO ticket is just a signed string consisting of fields separated
 by the pipe (``|``) character. It includes the ticket format version,
 username, service name, domain name, and group memberships.
 
-The current format version number is 2.
+The current format version number is 3.