Bug#1088443: debian-policy: Recommend Debian package version format when upstream has no releases

[Jeremy Bícha <jeremy.bicha@canonical.com>]

I prefer to keep the version number as simple as possible.

Therefore, I used the format 0~20200916-1 for fonts-noto-color-emoji
(before it later adopted regular versioned releases). That format is
not detected by your grep command. This is similar to the format Simon
is using except that in my usecases, I didn't see a need to mention
the git commit hash. Unless I am in a rare hurry, I simply use the
final commit of the day.

I have a hard time seeing why 0.0~ should be preferred over 0~

Thank you,
Jeremy Bícha