match browser-tolerant end tags in remove_tags_with_content

[uchiha-bug-hunter]

remove_tags_with_content only closed on a bare </tag>
Browsers end an element on the tag name followed by whitespace, /, or >, so </script >, </script\n>, </script/> and </script foo> all close it, yet these left the tag and its content in place. get_meta_refresh relies on this to strip <script>/<noscript>, so a <meta http-equiv=refresh> hidden as text inside a space-closed <script> came back as a redirect target that no browser follows.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.47%. Comparing base (22d04b7) to head (fc0f8bd).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #302   +/-   ##
=======================================
  Coverage   98.47%   98.47%           
=======================================
  Files           9        9           
  Lines         853      853           
  Branches      177      177           
=======================================
  Hits          840      840           
  Misses          5        5           
  Partials        8        8           

Files with missing lines	Coverage Δ
w3lib/html.py	100.00% <ø> (ø)

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[codspeed-hq]

Merging this PR will not alter performance

✅ 45 untouched benchmarks

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_{Comparing uchiha-bug-hunter:remove-tags-tolerant-end-tag (fc0f8bd) with master (22d04b7)}