I used prompt "pascal masks unit" and there are no results from Sourceforge on first page.
Yes, that is quite generic, lots of other Pascal environments around. Though the fpc docs are 3rd when I do that search:
https://www.freepascal.org/daily/doc/fcl/maskutils/index.html (again, one more click to the list of procedures in the unit).
And, also yes, google often prefers the wiki content over the docs. Its a case by case, if the wiki has "better" content (accuracy, up-to-date-ness). The wiki often has "longer" content, but that doesn't always mean "better". (and 1st result on that search is the wiki, 2nd is the forum)
But I don't know how much google use knowledge of a persons search history... I.e. if my results can be used to judge it.
I mainly brought the search up, because it had been a problem in the past (and some people may for that reason not try, because the had tried back then). Unfortunately for a long time (but as I said fixed for some time already), the sourceforge help pages had an incorrect robot.txt, that had blocked google.