diff: shrink

diff: shrink

function                                             old     new   delta
check                                                678    1607    +929
files_differ                                           -     175    +175
do_diff                                              436     433      -3
asciifile                                             94      90      -4
print_only                                            23      16      -7
diff_main                                            868     842     -26
prepare                                              339     301     -38
print_status                                         316     178    -138
diffreg                                             2993    1818   -1175
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(add/remove: 1/0 grow/shrink: 1/7 up/down: 1104/-1391)       Total: -287 bytes