New test.

svn path=/trunk/mcs/; revision=118022

mcs/errors/cs0028-2.cs

@@ -1,6 +1,6 @@
-// cs0028-2.cs: `T.Main()' has the wrong signature to be an entry point
+// CS0028: `T.Main()' has the wrong signature to be an entry point
 // Line: 6
-// Compiler options: -warnaserror -warn:4
+// Compiler options: -warnaserror:28 -warn:4
 
 class T {
         public static bool Main ()

mcs/errors/cs1691-2.cs

@@ -0,0 +1,4 @@
+// CS1691: `2' is not a valid warning number
+// Line: 0
+// Compiler options: -warnaserror:1691,2
+