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https://bugs.webkit.org/show_bug.cgi?id=159753

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Used zopfli 1.0.1 with `zopflipng.exe -m --lossy_transparent -y --iterations=1000`.

Before: 199 KB (203.922 bytes)
After:  197 KB (202.151 bytes)

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As this causes non-standard dotted outline on checkboxes/radio buttons
in OS X Firefox

Ports #19935 to v4
Refs #19933

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Add Most Wanted Features entries for <dialog>

Refs https://bugzil.la/840640
Refs https://webkit.org/b/84635

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SCSS-Lint 0.49.0 modifies Shorthand linter to report lint if a shorthand
of a length not specified in the allowed_shorthands option is used.

New defaults include "4" in the list of allowed shorthands, so we are changing our configuration accordingly.

Ref: https://github.com/brigade/scss-lint/commit/e283d1689699f581561fea344df3168128c46d7b

Fix typo in 'Reboot' section

Changed `box-sizing: border` to `box-sizing: border-box`

Update devDepedencies.

Avoid globbing in jscs npm script for Windows compatibility

Update dependencies.

Fixes #20197

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Only grunt-saucelabs is left in order to update grunt to v1.x.

* bower.json, package.json: Extend jQuery version ranges to include v3
* NuGet: Bump jQuery to v3.0.0.1
* Docs+Examples: Update jQuery to v3.0.0
* Use jQuery v3.0.0 for JS unit tests
* Update jqueryVersionCheck to allow jQuery v3.x.x

Fixes test flakiness on OS X Safari and Android when using jQuery 3.
Fixes #20182 more
Refs #20191

Use shx so that the npm scripts work everywhere the same.

Fixes #18813
Closes #20187

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Instead of doing a new assert.async(), just do a single one for the entire test
and let the .then() be async as well.

Closes #20190

Refs https://bugzilla.mozilla.org/show_bug.cgi?id=1282363

Closes #19906

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Previously, when running the docs locally, the site, rooted at:
    http://localhost:9001/
would reference docs assets using relative URLs such as:
    /../assets/js/vendor/anchor.min.js
which is equivalent to:
    http://localhost:9001/../assets/js/vendor/anchor.min.js
which is nonsense, since the root directory has no parent directory.
Apparently browsers silently ignore this extra '..', hence why this wasn't noticed until now.
But if you adjust Jekyll's `baseurl` setting, this mistake causes incorrect URLs to get generated.

This commit corrects the problem by removing the extra '../' from the paths.

These paths are also referenced in the Gruntfile, where the fix actually allows us to simplify the code.
Previously, in the Gruntfile, we were doing, e.g.:
    path.join('./docs/assets', '../assets/js/vendor/anchor.min.js')
which calculates to:
    ./docs/assets/../assets/js/vendor/anchor.min.js
which can be simplified to:
  ...

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Refs https://bugs.chromium.org/p/chromium/issues/detail?id=454172#c22

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Closes #20165

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