[phobos] [D-Programming-Language/phobos] ea2152: Fix BigInt.toString with "%x"

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: ea21524544954539fdaf95a5caa72ac8565b9412
      https://github.com/D-Programming-Language/phobos/commit/ea21524544954539fdaf95a5caa72ac8565b9412
  Author: e10s <electrolysis.jp at gmail.com>
  Date:   2015-04-28 (Tue, 28 Apr 2015)

  Changed paths:
    M std/bigint.d

  Log Message:
  -----------
  Fix BigInt.toString with "%x"

Partial fix for https://issues.dlang.org/show_bug.cgi?id=14503.


  Commit: 9e0b10c9aecd088fffbb7dae218240a6f2a25b58
      https://github.com/D-Programming-Language/phobos/commit/9e0b10c9aecd088fffbb7dae218240a6f2a25b58
  Author: e10s <electrolysis.jp at gmail.com>
  Date:   2015-04-30 (Thu, 30 Apr 2015)

  Changed paths:
    M std/bigint.d
    M std/internal/math/biguintcore.d

  Log Message:
  -----------
  append letterCase param to toHexString


  Commit: 353c6ef72f30ad3b28284b303f9cc1111283c278
      https://github.com/D-Programming-Language/phobos/commit/353c6ef72f30ad3b28284b303f9cc1111283c278
  Author: e10s <electrolysis.jp at gmail.com>
  Date:   2015-06-30 (Tue, 30 Jun 2015)

  Changed paths:
    M std/bigint.d

  Log Message:
  -----------
  use if-else instead of ?:


  Commit: 47dfc369b07d62988682404edf7b4a95dec93480
      https://github.com/D-Programming-Language/phobos/commit/47dfc369b07d62988682404edf7b4a95dec93480
  Author: H. S. Teoh <hsteoh at quickfur.ath.cx>
  Date:   2015-06-30 (Tue, 30 Jun 2015)

  Changed paths:
    M std/bigint.d
    M std/internal/math/biguintcore.d

  Log Message:
  -----------
  Merge pull request #3240 from e10s/issue14503

Fix BigInt.toString with "%x"


Compare: https://github.com/D-Programming-Language/phobos/compare/c3b05edcc5bc...47dfc369b07d