[Issue 13766] std.range documentation is now broken

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13766

--- Comment #1 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/D-Programming-Language/phobos

https://github.com/D-Programming-Language/phobos/commit/d24cc0a69cc8b397c10a6e801a82a7628d0de6ed
Include NullSink in std.range ddocs.

Partial fix for makefile to build std.range docs, that was broken after
std.range was split. This is only a partial fix; the full fix will have
to be done as part of [issue 13766]
(https://issues.dlang.org/show_bug.cgi?id=13766).

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