Fix problem with untrimmed command

[bambamboole]

After update to PHP 8.3 I got the following warnings in the bin/phpunit-wrapper.php:

Warning: unserialize(): Extra data starting at offset 534 of 535 bytes in /Users/xxx/Projects/xxx/vendor/brianium/paratest/bin/phpunit-wrapper.php on line 41

Trimming the command helped there.

[Slamdunk]

Can you add a test please?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.77%. Comparing base (8083a42) to head (3e7115c).

Additional details and impacted files

@@            Coverage Diff            @@
##                6.x     #844   +/-   ##
=========================================
  Coverage     99.77%   99.77%           
  Complexity      632      632           
=========================================
  Files            31       31           
  Lines          2207     2207           
=========================================
  Hits           2202     2202           
  Misses            5        5           

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[bambamboole]

@Slamdunk , maybe you can support me here, because I am having a hard time reproducing this in a test case. First of all I have extended now the CI test suite to also run on PHP 8.3. But how can I assert such a case in a bast way?
I "believe", that the error in general comes from the case, that PHP8.3 throws a warning like Warning: unserialize(): Extra data star... and because of that additional output the execution fails.

[Slamdunk]

I see only now that this PR targets 6.x branch: it's EOLed and I don't care much anymore, so I'll merge and release this as is.

Thank you for your contribution.