upstream library contains the anchor in url in its style :
@font-face { ... src: ..., url('./fonts/slick.svg#slick') format('svg'); }
https://gerrit.wikimedia.org/r/#/c/246154/1/resources/libs/slick/slick-theme.css
And Jenkins reports failure when testing it:
ResourcesTest::testFileExistence with data set #477 ( ...blablabla... ./fonts/slick.svg#slick') File '...blablabla... /fonts/slick.svg#slick' referenced by 'ext.PhpTagsWidgets.slick' must exist. Failed asserting that file "...blablabla... /fonts/slick.svg#slick" exists.
https://integration.wikimedia.org/ci/job/mwext-PhpTagsWidgets-testextension-zend/33/console
I do not know for what the anchor there and whether I need to fix it.
May be ResourcesTest::testFileExistence should ignore anchor in url, doesn't it?