if key_desc contains a,b then it expects pairs and multiple:yes is not needed

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43824 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.db.renamecolumn/v.db.renamecolumn.py

@@ -46,7 +46,7 @@
 #% type: string
 #% description: Old and new name of the column (old,new)
 #% required : yes
-#% multiple: yes
+#% multiple: no
 #% key_desc: oldcol,newcol
 #%end