branches/zip: dtuple_print(): Dump each field in a separate line,

so that the dumps can be read and compared more easily.
This is related to the change to rec_print_old() and rec_print_comp()
in r3148.

data/data0data.c

@@ -534,9 +534,9 @@ dtuple_print(
 		dfield_print_raw(f, dtuple_get_nth_field(tuple, i));
 
 		putc(';', f);
+		putc('\n', f);
 	}
 
-	putc('\n', f);
 	ut_ad(dtuple_validate(tuple));
 }