fix issue 17780 - Malformed DDOC links in std.range

[ghost]

see #5707, ping @wilzbach.

[dlang-bot]

Thanks for your pull request, @bbasile! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.

Some tips to help speed things up:

• smaller, focused PRs are easier to review than big ones

• try not to mix up refactoring or style changes with bug fixes or feature enhancements

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Please see CONTRIBUTING.md for more information.

Bugzilla references

Auto-close	Bugzilla	Description
✓	17780	Malformed DDOC links in std.range

[PetarKirov]

Thanks, LGTM.