> As far as I know there is no curated collection of ms documents against which ms implementations can be measured. Are you in a position to share some of your collection with the community?
There were -ms man pages in v6 through v10, and versions of Lesk's 1974 memorandum in v6, v7,and v10. I have paper copies of all but the 1974 document. All but v10 are readily scannable. > I said last month[1] that the historical AT&T ms footnote ratio was 5/6, but this is clearly wrong as my own email earlier today to this list illustrated with links to TUHS archives of V6 and V7 sources. Alternative facts! Both the v7 and v10 versions of Lesk's memos say 5/6. (I didn't check v6.) I imagine it began at 5/6 and was changed by public demand. The Gnu version must have been built conscientiously without peeking at the code.. Incidentally, FL is a macro in v6-7 and a number register in Gnu.