flag: include args after end-of-options(--) when checking min and max args (#21310)

vlib/flag/flag.v

@@ -607,25 +607,19 @@ pub fn (mut fs FlagParser) finalize() ![]string {
 			}
 		}
 	}
-	if remaining.len < fs.min_free_args && fs.min_free_args > 0 {
+	remaining << fs.all_after_dashdash
+	if fs.min_free_args > remaining.len {
 		return &ArgsCountError{
 			want: fs.min_free_args
 			got: remaining.len
 		}
 	}
-	if remaining.len > fs.max_free_args && fs.max_free_args > 0 {
+	if fs.max_free_args < remaining.len {
 		return &ArgsCountError{
 			want: fs.max_free_args
 			got: remaining.len
 		}
 	}
-	if remaining.len > 0 && fs.max_free_args == 0 && fs.min_free_args == 0 {
-		return &ArgsCountError{
-			want: 0
-			got: remaining.len
-		}
-	}
-	remaining << fs.all_after_dashdash
 	return remaining
 }
 

vlib/flag/flag_test.v

@@ -204,6 +204,14 @@ fn test_free_args_could_be_limited() {
 	assert args[0] == 'a'
 	assert args[1] == 'b'
 	assert args[2] == 'c'
+
+	mut fp2 := flag.new_flag_parser(['--', 'a'])
+	fp2.limit_free_args_to_at_least(1)!
+	args2 := fp2.finalize() or {
+		assert false
+		return
+	}
+	assert args2[0] == 'a'
 }
 
 fn test_error_for_to_few_free_args() {