tools: fix nits in tools/doc/preprocess.js #19473
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Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passesES6 nits:
vars withlets..forEach()argument.RegExp nits:
[A-Za-z0-9-_]into[\w-].includeExprRegExp: there is no need to group in its case +includeExpris used only in.match()call that does not return capturing..match()with.test()in a boolean context.Logic nits:
.match()withgflag can only returnnullor non-empty array (it cannot return an array with0length) +incCountmay be changed only after this check.I've built the docs on Windows (using #19330) before and after these changes and both doc sets are identical +
test/doctool/test-make-doc.jsis OK.