tests.7: Bump the date and improve the format

[igoro]

Summary

Reported by: ziaee, lwhsu

[lwhsu]

I don't know the exact policy, but my personal feeling is that for format/typo changes, I don't bump the date.
If this is for bumping a previous content editing without bumping the date, that it's fine.

[ziaee]

for format/typo changes, I don't bump the date.

Sorry for the oversight, this is correct. We should not bump the date here.

[igoro]

In D49798#1135647, @ziaee wrote:

for format/typo changes, I don't bump the date.

Sorry for the oversight, this is correct. We should not bump the date here.

I forgot to mention that this is a follow-up of https://reviews.freebsd.org/D49594. This patch applies the man improvement suggested by @ziaee and adds the missing date bump as it was spotted by @lwhsu .