While using reserved PHP keywords as parameter name labels is allowed, in the context of function calls using named parameters in PHP 8.0+, this will easily lead to confusion. To avoid that, it is recommended not to use reserved keywords as function parameter names.
This commit renames the `$default` parameter to `$default_value` in `check_column()`.
Follow-up to [52946], [52996], [52997], [52998], [53003], [53014], [53029], [53039], [53116], [53117], [53137], [53174], [53184], [53185], [53192], [53193], [53198], [53203], [53207], [53215], [53216], [53220], [53230].
Props jrf, aristath, poena, justinahinon, SergeyBiryukov.
See #55327.
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git-svn-id: http://core.svn.wordpress.org/trunk@52821 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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