perlapi: Combine all forms of sv_derived_from into one group #22321
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Having one group containing the descriptions of all closely related functions makes the pod more compact and makes maintenance easier; fixes only need to be applied in one place. And it encourages the documentation authors to compare and contrast the variants, paying closer attention to the subtle differences between them.
And it is easier for the reader to choose the variant that is best for their current purpose, rather than hopping around the file, unsure if the current text is identical to that found elsewhere, or if there is a subtle nuance (or three).
derived_from