[stable31] fix(details): Accept details open tag and summary tag in same line

[backportbot]

Backport of PR #7202

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.92%. Comparing base (958ab67) to head (5e30aea).
Report is 11 commits behind head on stable31.

Additional details and impacted files

@@ Coverage Diff @@## stable31 #7227 +/- ##
=========================================
Coverage 51.92% 51.92% =========================================
Files 286 286 Lines 41011 41018 +7 Branches 816 817 +1 =========================================
+ Hits 21293 21300 +7 
Misses 19602 19602 Partials 116 116 

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