May 25, 2014
  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/dmd
  Commit: 5920f0953c9e7f4683d8c6f90a15497c95870076
      https://github.com/D-Programming-Language/dmd/commit/5920f0953c9e7f4683d8c6f90a15497c95870076
  Author: k-hara <k.hara.pg@gmail.com>
  Date:   2014-05-25 (Sun, 25 May 2014)

  Changed paths:
    M src/optimize.c

  Log Message:
  -----------
  fix Issue 12798 - constant folding should optimize subsequent concatenations


  Commit: 99ccc90d669d92af80a55a509abfc09e1cafac8e
      https://github.com/D-Programming-Language/dmd/commit/99ccc90d669d92af80a55a509abfc09e1cafac8e
  Author: Walter Bright <walter@walterbright.com>
  Date:   2014-05-25 (Sun, 25 May 2014)

  Changed paths:
    M src/optimize.c

  Log Message:
  -----------
  Merge pull request #3581 from 9rnsr/fix12798

Issue 12798 - constant folding should optimize subsequent concatenations


Compare: https://github.com/D-Programming-Language/dmd/compare/a38d87765a0b...99ccc90d669d