----
-stty / catv
- stty's visible() function and catv's guts are identical. Merge them into
- an appropriate libbb function.
----
-struct suffix_mult
- Several duplicate users of: grep -r "1024\*1024" * -B2 -A1
- Merge to a single size_suffixes[] in libbb.
- Users: head tail od_bloaty hexdump and (partially as it wouldn't hurt) svlogd
----
-tail
- ./busybox tail -f foo.c~ TODO
- should not print fmt=header_fmt for subsequent date >> TODO; i.e. only
- fmt+ if another (not the current) file did change