Sergey Biryukov 38b5c686a1 Tests: Use more appropriate assertions in wp_get_global_stylesheet() tests.
This replaces instances of `assertTrue( str_contains( ... ) )` with `assertStringContainsString()` to use native PHPUnit functionality.

Follow-up to [52675], [52676].

See #54782.

git-svn-id: https://develop.svn.wordpress.org/trunk@52677 602fd350-edb4-49c9-b593-d223f7449a82
2022-02-04 14:33:33 +00:00
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