[parrot/parrot] 2d93a9: [test] improve pcre.t for returned error string

[GitHub]

  Branch: refs/heads/smoke-me/pcre_nci-gh258
  Home:   https://github.com/parrot/parrot
  Commit: 2d93a9732689f49756aabd28f94e24abbd3c73df
      https://github.com/parrot/parrot/commit/2d93a9732689f49756aabd28f94e24abbd3c73df
  Author: Ronald Schmidt <RonaldXS at software-path.com>
  Date:   2016-02-16 (Tue, 16 Feb 2016)

  Changed paths:
    M t/library/pcre.t

  Log Message:
  -----------
  [test] improve pcre.t for returned error string

Closes GH #258