test: use index_in_strings

function                                             old     new   delta
ops_texts                                              -     124    +124
ops_table                                              -      80     +80
display_process_list                                1447    1448      +1
binop                                                525     523      -2
static.no_op                                           6       2      -4
check_operator                                        71      63      -8
ops                                                  240       -    -240
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 1/3 up/down: 205/-254)          Total: -49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed