Makes built-in vararg methods actual vararg methods

- Removes hardcoded parameters from built-in vararg methods and adds METHOD_FLAG_VARARG to them.
- Makes EditorHelp display built-in vararg methods correctly.

editor/doc/doc_data.cpp

@@ -576,6 +576,12 @@ void DocData::generate(bool p_basic_types) {
 				MethodDoc md;
 				md.name = mi.name;
 
+				if (mi.flags & METHOD_FLAG_VARARG) {
+					if (md.qualifiers != "")
+						md.qualifiers += " ";
+					md.qualifiers += "vararg";
+				}
+
 				return_doc_from_retinfo(md, mi.return_val);
 
 				for (int i = 0; i < mi.arguments.size(); i++) {

modules/gdscript/gd_editor.cpp

@@ -1863,11 +1863,11 @@ static void _find_call_arguments(GDCompletionContext &context, const GDParser::N
 				arghint += ", ";
 			else
 				arghint += " ";
-			if (i == p_argidx) {
+			if (i == p_argidx || (mi.flags & METHOD_FLAG_VARARG && i > p_argidx)) {
 				arghint += String::chr(0xFFFF);
 			}
 			arghint += _get_visual_datatype(mi.arguments[i]) + " " + mi.arguments[i].name;
-			if (i == p_argidx) {
+			if (i == p_argidx || (mi.flags & METHOD_FLAG_VARARG && i > p_argidx)) {
 				arghint += String::chr(0xFFFF);
 			}
 		}

modules/gdscript/gd_functions.cpp

@@ -1572,43 +1572,49 @@ MethodInfo GDFunctions::get_info(Function p_func) {
 		} break;
 		case TEXT_STR: {
 
-			MethodInfo mi("str", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("str");
 			mi.return_val.type = Variant::STRING;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 
 		} break;
 		case TEXT_PRINT: {
 
-			MethodInfo mi("print", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("print");
 			mi.return_val.type = Variant::NIL;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 
 		} break;
 		case TEXT_PRINT_TABBED: {
 
-			MethodInfo mi("printt", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("printt");
 			mi.return_val.type = Variant::NIL;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 
 		} break;
 		case TEXT_PRINT_SPACED: {
 
-			MethodInfo mi("prints", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("prints");
 			mi.return_val.type = Variant::NIL;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 
 		} break;
 		case TEXT_PRINTERR: {
 
-			MethodInfo mi("printerr", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("printerr");
 			mi.return_val.type = Variant::NIL;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 
 		} break;
 		case TEXT_PRINTRAW: {
 
-			MethodInfo mi("printraw", PropertyInfo(Variant::NIL, "what"), PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("printraw");
 			mi.return_val.type = Variant::NIL;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 
 		} break;
@@ -1640,8 +1646,9 @@ MethodInfo GDFunctions::get_info(Function p_func) {
 		} break;
 		case GEN_RANGE: {
 
-			MethodInfo mi("range", PropertyInfo(Variant::NIL, "..."));
+			MethodInfo mi("range");
 			mi.return_val.type = Variant::ARRAY;
+			mi.flags |= METHOD_FLAG_VARARG;
 			return mi;
 		} break;
 		case RESOURCE_LOAD: {