grotere buffer voor scanner

cmd/data2json/data2json.go

@@ -142,6 +142,7 @@ func makeValues(source, part string) [][5]any {
 	fp, err := os.Open(filename)
 	x(err)
 	scanner := bufio.NewScanner(fp)
+	scanner.Buffer(nil, 1000000)
 	lineno := 0
 	for scanner.Scan() {
 		line := scanner.Text()