Improve support for warning categories #3508
Merged
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This adds support for the
category
keyword forKernel#warn
(for Ruby level warnings), and addsrb_category_warn
andrb_category_warning
C-API functions (for C level warnings). It changesWarning.warn
to only accept acategory
keyword, instead of accepting arbitrary keywords. It modifies all of the warnings emitted by core Ruby to use a category.This also removes some deprecated functions/methods that were scheduled to be removed in Ruby 3.0 that I found while looking for warnings to modify.