Parse next paragraph out of *pcomment. Update *pcomment to point past paragraph. Returns NULL if no more paragraphs. If paragraph ends in 'identifier:', then (*pcomment)[0 .. idlen] is the identifier.
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Parse next paragraph out of *pcomment. Update *pcomment to point past paragraph. Returns NULL if no more paragraphs. If paragraph ends in 'identifier:', then (*pcomment)[0 .. idlen] is the identifier.