[Issue 22785] joiner does not support range over immutable

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22785

Dlang Bot <dlang-bot at dlang.rocks> changed:

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--- Comment #3 from Dlang Bot <dlang-bot at dlang.rocks> ---
@FeepingCreature created dlang/phobos pull request #8737 "Fix issue 22785:
`joiner` should `Unqual` child ranges." fixing this issue:

- Fix issue 22785: `joiner` should `Unqual` child ranges.
  This allows use with `immutable T[][]` and similar.

https://github.com/dlang/phobos/pull/8737

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