%F is specified by ISO C99. It adds semantic meaning as printing an
ISO 8601 date.
Scripted change:
$ cat ~/tmp/spatch/strftime_F.sp
@@
@@
- "%Y-%m-%d"
+ "%F"
$ find contrib/ lib* src/ -type f \
| xargs spatch --sp-file ~/tmp/spatch/strftime_F.sp --in-place
Signed-off-by: Alejandro Colomar <alx@kernel.org>