[PR #8335/5a6949da backport][3.9] Add Content-Disposition automatically

[patchback]

This is a backport of PR #8335 as merged into master (5a6949d).

Fixes #8326.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.33%. Comparing base (7eecdff) to head (c317e08).

Additional details and impacted files

@@            Coverage Diff             @@
##              3.9    #8336      +/-   ##
==========================================
- Coverage   97.39%   97.33%   -0.07%     
==========================================
  Files         108      108              
  Lines       32856    32869      +13     
  Branches     3901     3903       +2     
==========================================
- Hits        32001    31992       -9     
- Misses        645      663      +18     
- Partials      210      214       +4     

Flag	Coverage Δ
CI-GHA	97.25% <100.00%> (-0.06%)	⬇️
OS-Linux	96.92% <100.00%> (-0.06%)	⬇️
OS-Windows	94.53% <100.00%> (+<0.01%)	⬆️
OS-macOS	96.65% <100.00%> (+<0.01%)	⬆️
Py-3.10.11	94.34% <100.00%> (-0.01%)	⬇️
Py-3.10.14	96.76% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	97.02% <100.00%> (+<0.01%)	⬆️
Py-3.12.2	97.07% <100.00%> (+0.29%)	⬆️
Py-3.12.3	?
Py-3.8.10	94.33% <100.00%> (+<0.01%)	⬆️
Py-3.8.18	96.70% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	94.34% <100.00%> (+<0.01%)	⬆️
Py-3.9.19	96.76% <100.00%> (+0.01%)	⬆️
Py-pypy7.3.15	?
VM-macos	96.65% <100.00%> (+<0.01%)	⬆️
VM-ubuntu	96.92% <100.00%> (-0.06%)	⬇️
VM-windows	94.53% <100.00%> (+<0.01%)	⬆️

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