Deprecate hexstring literals

[wilzbach]

Revival of #6925

Requires:

• Replace deprecated hexstrings with std.conv.hexString phobos#6058

Dlang.org PR: dlang/dlang.org#2118

[dlang-bot]

Thanks for your pull request, @wilzbach!

Bugzilla references

Your PR doesn't reference any Bugzilla issue.

If your PR contains non-trivial changes, please reference a Bugzilla issue or create a manual changelog.

[JackStouffer]

Why? Seems like removal for the sake of removal.

[andralex]

@JackStouffer putting forward language power over built-in magic sets the tone right. Though I'd very very very much encourage @wilzbach, you, and everyone to focus on the big rocks.

[wilzbach]

Though I'd very very very much encourage @wilzbach, you, and everyone to focus on the big rocks.

Understood, but in this case it took me 15 minutes to do all three PRs and I felt a bit guilty because I was the one who set Phobos to use -de which let @bbasile who tried to push this one year ago to give up his attempt (see #6925).