Error message for missing arg incorrect for methods with zero args #2296.

test/test_suite/methods/method_error_args.c3

@@ -0,0 +1,10 @@
+module test;
+import std;
+
+fn void String.hello(self, int a, int b) {}
+fn void main()
+{
+	String s = "foek";
+	s.hello();  // #error: 'hello' expects 2 parameter(s), but none was provided
+	s.hello(1); // #error: 1 more argument was expected after this one, did you forget it?
+}