Escape newlines when printing functions in timer list

* timer-list.el (list-timers): Bind `print-escape-newlines' to avoid
newlines in printed representation (bug#36187).
1 job for master in 90 minutes and 1 second (queued for 4 seconds)
Status Job ID Name Coverage
failed #2149


Name Stage Failure
test-all Test The script exceeded the maximum execution time set for the job
  GEN      lisp/replace-tests.log
ELC lisp/rot13-tests.elc
GEN lisp/rot13-tests.log
ELC lisp/ses-tests.elc
GEN lisp/ses-tests.log
ELC lisp/shadowfile-tests.elc
GEN lisp/shadowfile-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-f100a208 ...
ERROR: Job failed: execution took longer than 1h30m0s seconds