This PR was submitted for the 3.4 branch but it was squashed and merged into the 2.8 branch instead (closes #10062).

Discussion
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[PHPUnitBridge] Explain how to show stack traces

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Commits
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a6e1282 [PHPUnitBridge] Explain how to show stack traces

* 3.4:
  Simplified the "Release Process" page
  [Workflow] Fix typo documentation
  Fix mismatched list items
  [symfony#9988] fix minor typos
  [symfony#10099] update XML and PHP config examples
  [symfony#9969] fix a minor typo
  [symfony#10022] fix a minor typo
  preUpdate Event Listener On Uploaded Imagery
  [symfony#10124] fix XML attribute name
  [symfony#10062] fix the code block
  [PHPUnitBridge] Explain how to show stack traces
  Fix docs on trusted hosts
  opcode optimizations

* 4.1:
  Simplified the "Release Process" page
  [Workflow] Fix typo documentation
  Fix mismatched list items
  typos in sample code
  [symfony#9988] fix minor typos
  [symfony#10099] update XML and PHP config examples
  [symfony#9969] fix a minor typo
  [symfony#10022] fix a minor typo
  preUpdate Event Listener On Uploaded Imagery
  [symfony#9757] fix rst syntax
  [symfony#10124] fix XML attribute name
  [symfony#10062] fix the code block
  [PHPUnitBridge] Explain how to show stack traces
  Fix docs on trusted hosts
  opcode optimizations