[phobos] [dlang/phobos] 58b1f7: Document narrow string front, back

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/dlang/phobos
  Commit: 58b1f7a03e69f85ac97a8872dd4c52e3a3f5b676
      https://github.com/dlang/phobos/commit/58b1f7a03e69f85ac97a8872dd4c52e3a3f5b676
  Author: Nick Treleaven <nick.treleaven at btinternet.com>
  Date:   2016-05-04 (Wed, 04 May 2016)

  Changed paths:
    M std/range/primitives.d

  Log Message:
  -----------
  Document narrow string front, back

Also make back not compile when T is void, as front does.


  Commit: 613971ab3092a5b4ff99d68caa11e1e3795ae9d3
      https://github.com/dlang/phobos/commit/613971ab3092a5b4ff99d68caa11e1e3795ae9d3
  Author: Dmitry Olshansky <dmitry.olsh at gmail.com>
  Date:   2016-05-05 (Thu, 05 May 2016)

  Changed paths:
    M std/range/primitives.d

  Log Message:
  -----------
  Merge pull request #4281 from ntrel/front-doc

[trivial] Document narrow string front, back


Compare: https://github.com/dlang/phobos/compare/007abeb0cc37...613971ab3092