Fix flaky test failures in 01_run.t; improve tests

[okurz]

• t: Fix flaky test failures in 01_run.t after removing timeout in "stop()"
• t: Generalize test for 'diag' to also accept format from perl debugger
• t: Prevent line wrap in test explanation string to prevent confusion
• t: Fix incorrect english spelling in explanation string
• t: Delete duplicate test line 'pipes are correctly disabled'

[okurz]

well, that didn't work: https://travis-ci.org/github/mudler/Mojo-IOLoop-ReadWriteProcess/jobs/665023160#L500 shows

t/01_run.t ............... 3/?     
    #   Failed test 'Still able to get stdout output, always in getline()'
    #   at t/01_run.t line 196.
    #          got: undef
    #     expected: 'TEST normal print
    # '
    # Looks like you failed 1 test of 37.
t/01_run.t ............... 4/? 

sigh. Not sure what to do next.

[codecov-io]

Codecov Report

Merging #8 into master will increase coverage by 0.16%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
+ Coverage   88.76%   88.92%   +0.16%     
==========================================
  Files          27       27              
  Lines         881      885       +4     
  Branches      200      203       +3     
==========================================
+ Hits          782      787       +5     
+ Misses         21       20       -1     
  Partials       78       78

Impacted Files	Coverage Δ
lib/Mojo/IOLoop/ReadWriteProcess/Container.pm	86.36% <0%> (-0.74%)	:arrow_down:
lib/Mojo/IOLoop/ReadWriteProcess.pm	90.68% <0%> (+0.71%)	:arrow_up:

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[okurz]

Ok, managed to fix all problems, I guess. Thanks to @Martchus for the productive pair-programming session :)

[okurz]

@mudler @foursixnine could you take a look please? All tests are stable now, I improved tests and would appreciate if we can have this patch merged and a new release of the package published.

[mudler]

Done! Thank you!