quickSafe: do not call show on already escaped output (#30)

This output:

   *** Failed! ... QFilePath "/\\?/a:a"

is much easier to digest than:

   "*** FAILED! ... \NQFILEPATH \"/\\\\?/A:A\"\N"
Merge pull request #31 from thomie/output

quickSafe: do not call show on already escaped output (#30)