Use compiler error message for the issue provider.

ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/CompilerErrors/CS0127ReturnMustNotBeFollowedByAnyExpression.cs

@@ -83,10 +83,13 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				if (!returnStatement.Expression.IsNull) {
 					AddIssue(
 						returnStatement, 
+						string.Format (ctx.TranslateString("`{0}': A return keyword must not be followed by any expression when method returns void"), currentMethod.Name),
+						new CodeAction (
 							ctx.TranslateString("Remove returned expression"),
 							script => {
 								script.Remove(returnStatement.Expression); 
 							}
+						)
 					);
 				}
 			}