Update html5lib tests (for <isindex>)

[zcorpan]

I wanted to update html5lib tests (for html5lib/html5lib-tests#74) and tried to follow the instructions in html/tools/update_html5lib_tests.py and expected at least isindex.dat to have changed but it seems it did not...

git status
On branch htmlpreelement
Your branch is up-to-date with 'origin/htmlpreelement'.
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

    modified:   syntax/parsing/html5lib_entities01.html
    modified:   syntax/parsing/html5lib_entities02.html
    modified:   syntax/parsing/html5lib_template.html
    modified:   syntax/parsing/html5lib_tests11.html
    modified:   syntax/parsing/html5lib_tests7.html
    modified:   syntax/parsing/html5lib_webkit01.html
    modified:   syntax/parsing/html5lib_webkit02.html
    modified:   ../resources (new commits)
    modified:   ../tools (new commits)

Untracked files:
  (use "git add <file>..." to include in what will be committed)

    syntax/parsing/html5lib_innerHTML_foreign-fragment.html
    syntax/parsing/html5lib_innerHTML_math.html
    syntax/parsing/html5lib_innerHTML_webkit02.html
    syntax/parsing/html5lib_namespace-sensitivity.html
    syntax/parsing/html5lib_ruby.html
    tools/venv/

cc @jgraham

[zcorpan]

@gsnedders can you help?

[gsnedders]

No, all @jgraham's stuff. (And I'm going on holiday as soon as this delayed flight gets here…)

[foolip]

Is this issue still relevant? Have we not synced with html5lib in 2+ years?

[zcorpan]

I'm afraid so :-/

[foolip]

Alright, so as part of an upcoming documentation drive we should probably document what all of the third-party does are and how they are updated. Ideally we should have auto-updates from source like for interfaces/ now.

[gsnedders]

This would be easier to do if we had something to parse the tests in html5lib-tests. Say, like, as part of a linter html5lib/html5lib-tests#83 (PR opened over two years ago!).

[zcorpan]

I guess this issue is fixed because html/tools/build.sh hardcodes the html5lib-python commit d49afd3, at which point html5lib-python was using commit 71eebd5 of html5lib-tests which is newer than the isindex change from 2016.

I've created a new issue though because updating parser tests is ... not as easy as it could be: #27868