Change new MAST auth from === to ---
@@ -591,7 +591,7 @@ switch from accepting a username/password and instead accept a auth token.
Accessing Proprietary Data (Token Method)
-=========================================
+-----------------------------------------
This will be enabled in early November 2018.
@@ -638,7 +638,7 @@ To logout before a session expires, the `~astroquery.mast.MastClass.logout` meth
Accessing Proprietary Data (Password Method)
-============================================
+--------------------------------------------
This will be disabled in early November 2018.
