Properly handle <!-- <script </script in JavaScript

[marschall]

This is my try a fixing #1379.

If we check the release version of 4.12.1.3 Restrictions for contents of script elements we need to handle <!--, <script and </script.

• cherry pick the tests from Escape nested script and comment tags in generated Javascript #1381 and extend them for </script
• revert the test adaptations

I tried to do meaningful commits.

Fixes #1379

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.09%. Comparing base (44e5bb7) to head (66a0987).
Report is 18 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1429      +/-   ##
==========================================
- Coverage   49.10%   49.09%   -0.02%     
==========================================
  Files        9143     9150       +7     
  Lines       80545    80633      +88     
==========================================
+ Hits        39553    39584      +31     
- Misses      40992    41049      +57     

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[marschall]

Explanatory comments for reviewers.

[jbrichau]

Thanks for having addressed this. It was pending on my stack since a while ;-)
Just a minor method revert to change and this is good to go for me!

[jbrichau]

@marschall I noticed you made the change but did not trigger a new review. I assume this PR is ready? If it is, I will happily merge it.

[marschall]

I assume this PR is ready?

Yes, it is.

If it is, I will happily merge it.

That would be great.