Removed duplicated output from exhausted test case
Removed duplicated output from exhausted test case

See previous commit message for further detail.

Here's a typical test run output for an exhausted test before the change:

-------------------------------------------------------------------------------
------ Test started: Assembly: ConwaysGameOfLife04.dll ------

Test 'Ploeh.Katas.GameOfLifeProperties.Any live cell with < 2 live neighbors dies' failed: FsCheck.Xunit.PropertyFailedException :
Arguments exhausted after 28 tests.

Output from Ploeh.Katas.GameOfLifeProperties.Any live cell with < 2 live neighbors dies:
  Arguments exhausted after 28 tests.

0 passed, 1 failed, 0 skipped, took 1,07 seconds (xUnit.net 2.1.0 build 3179).
-------------------------------------------------------------------------------

Here is the same test run after the change:

-------------------------------------------------------------------------------
------ Test started: Assembly: ConwaysGameOfLife04.dll ------

Test 'Ploeh.Katas.GameOfLifeProperties.Any live cell with < 2 live neighbors dies' failed: FsCheck.Xunit.PropertyFailedException :
Arguments exhausted after 18 tests.

0 passed, 1 failed, 0 skipped, took 1,09 seconds (xUnit.net 2.1.0 build 3179).
-------------------------------------------------------------------------------

Duplication is gone.

fsharp/FsCheck,ErikSchierboom/FsCheck,sideeffffect/FsCheck,fscheck/FsCheck,ploeh/FsCheck,fscheck/FsCheck,jhamm/FsCheck