$ docker run --rm --name validator-giflib-usage-giflib-tools-gifclrmp-grid-reload-modified-2536 -t --mount type=bind,src=/tmp/validator-status-giflib-usage-giflib-tools-gifclrmp-grid-reload-modified,dst=/validator/status validator-giflib-shared bash -lc 'set -euo pipefail
/validator/tests/_shared/install_override_debs.sh
exec /validator/tests/_shared/run_library_tests.sh "$@"' validator-testcase giflib usage-giflib-tools-gifclrmp-grid-reload-modified -- bash -c 'PS4=$1; shift; set -x; source "$@"' validator-xtrace '__VALIDATOR_XTRACE__ ' /validator/tests/giflib/tests/cases/usage/usage-giflib-tools-gifclrmp-grid-reload-modified.sh
no override packages found; continuing with apt originals
import sys
src, dst = sys.argv[1], sys.argv[2]
with open(src) as fh:
    lines = fh.readlines()
# Each row is "<index> <r> <g> <b>"; rewrite row 1.
parts = lines[1].split()
parts[1], parts[2], parts[3] = "11", "22", "33"
lines[1] = " ".join(parts) + "\n"
with open(dst, "w") as fh:
    fh.writelines(lines)
' /tmp/validator-tmp/cmap.txt /tmp/validator-tmp/cmap-mod.txt