Coverage-xml cannot contain pcov and xdebug at the same time

[staabm]

attribute name needs to be unique

closes #1131

---

this regressed in 5b74f62 which previously used DOM to de-duplicate the attribute name automatically because it just overwrote the previous value

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.42%. Comparing base (9654885) to head (2bf6ded).
⚠️ Report is 7 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1132   +/-   ##
=========================================
  Coverage     88.42%   88.42%           
  Complexity     1390     1390           
=========================================
  Files           105      105           
  Lines          4700     4700           
=========================================
  Hits           4156     4156           
  Misses          544      544           

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[stijnh92]

Can confirm that this works and generates valid XML.

[sebastianbergmann]

Thank you for your contribution. I appreciate the time you invested in preparing this pull request. However, I have decided not to merge it.