Publish script?
Appearance
I think it would be good if the script to generate this list would make it into Translate/scripts/credits.php and would be referenced as a comment in the code from gerrit:73611.
There isn't any script. Of course, if someone creates it, all the better. (IMHO it should be MediaWiki's devs' responsibility but it seems they think it's ours.)
This does the trick:
grep -h '@author' * | sed 's/ \* @author //' | sort -b |uniq |sed 's/^.*/* [[User:&|&]]/'
2271 authors at the moment. If there are entries that are similar, they should most likely be fixed by hand.