> I wonder what those "+" markers are for, they have been added in > [48615a4].
Uh, oh, a lot of them are lost :-( As documented in the man page, they indicate that the (two-letter) glyph name is documented in the original troff manual. I fear that Bernd won't be able to fix this due to personal issues, so maybe someone can check the groff_char man page from version 1.22.2, re-adding the plus signs. Werner