D-Programming-Language/phobos — pull request #2651 by quickfur (2014-10-31 20:21:54+00:00)
Title: Fix issue 13594: next(Even)Permutation doesn't need to take input range by ref.

Fixes: https://issues.dlang.org/show_bug.cgi?id=13594

Supercedes: https://github.com/D-Programming-Language/phobos/pull/2650