watch-file: converted to bash.

Author Pascal J. Bourguignon <pjb@informatimago.com>
Author date 2021-09-08 10:14:06
Author local date 2021-09-08 12:14:06 +0200
Committer Pascal J. Bourguignon <pjb@informatimago.com>
Committer date 2021-09-08 10:14:06
Committer local date 2021-09-08 12:14:06 +0200
Commit fbdd346420a004cf60dcd30ab611cc67ad5f3fa9
Tree 8aec2a778290bce395f746efc8c850d4df0789be
Parent 392581ec3227ee09323912107cfc3f9d81c43a03
watch-file: converted to bash.
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