commit b6e8afc8511262ca5405a084d806cdd5e52519c7
Author: Valentina Mukhamedzhanova <vmukhame@redhat.com>
Date:   Tue May 26 10:01:07 2015 +0200

    yum-config-manager: require \* syntax to disable all repos. BZ#1151154

diff --git a/yum-config-manager.py b/yum-config-manager.py
index 708c33f..0531c72 100755
--- a/yum-config-manager.py
+++ b/yum-config-manager.py
@@ -146,8 +146,11 @@ if opts.enable and opts.disable:
     logger.error("Error: Trying to enable and disable repos.")
     opts.enable = opts.disable = False
 if opts.enable and not args:
-    logger.error("Error: Trying to enable already enabled repos.")
+    logger.error("Error: please specify repos to enable (\* to enable all).")
     opts.enable = False
+if opts.disable and not args:
+    logger.error("Error: please specify repos to disable (\* to disable all).")
+    opts.disable = False
 
 only = None