[phobos] [dlang/phobos] efe33e: fix docs in iteration

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/dlang/phobos
  Commit: efe33e3470ba284bb8aad0ce8bbce058b3394455
      https://github.com/dlang/phobos/commit/efe33e3470ba284bb8aad0ce8bbce058b3394455
  Author: Ilya Yaroshenko <ilyayaroshenko at gmail.com>
  Date:   2016-07-26 (Tue, 26 Jul 2016)

  Changed paths:
    M std/algorithm/iteration.d

  Log Message:
  -----------
  fix docs in iteration

`sum` is not precise. Precise algorithms are Python `fsum` and Mir's [`sum!(Summation.precise)`](http://docs.mir.dlang.io/latest/mir_sum.html)


  Commit: f9dd0f8e3f965fbcc59b34bd9d666a9f9fc9fe93
      https://github.com/dlang/phobos/commit/f9dd0f8e3f965fbcc59b34bd9d666a9f9fc9fe93
  Author: Walter Bright <WalterBright at users.noreply.github.com>
  Date:   2016-07-26 (Tue, 26 Jul 2016)

  Changed paths:
    M std/algorithm/iteration.d

  Log Message:
  -----------
  Merge pull request #4660 from 9il/9il-patch-3

fix docs in algorithm.iteration


Compare: https://github.com/dlang/phobos/compare/dc56fc161572...f9dd0f8e3f96