[phobos] [dlang/phobos] 90783d: fix docs for `diagonal`

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/dlang/phobos
  Commit: 90783dbee6969069cda59b0feba36adb997f8c36
      https://github.com/dlang/phobos/commit/90783dbee6969069cda59b0feba36adb997f8c36
  Author: Ilya Yaroshenko <ilyayaroshenko at gmail.com>
  Date:   2016-04-18 (Mon, 18 Apr 2016)

  Changed paths:
    M std/experimental/ndslice/selection.d

  Log Message:
  -----------
  fix docs for `diagonal`


  Commit: e62921e5e809ca18778d6ca5fb708ffce0a8d5cd
      https://github.com/dlang/phobos/commit/e62921e5e809ca18778d6ca5fb708ffce0a8d5cd
  Author: Brian Schott <briancschott at gmail.com>
  Date:   2016-04-18 (Mon, 18 Apr 2016)

  Changed paths:
    M std/experimental/ndslice/selection.d

  Log Message:
  -----------
  Merge pull request #4212 from 9il/docsd

fix docs for `diagonal`


Compare: https://github.com/dlang/phobos/compare/4f18045c7fa9...e62921e5e809