On line 35 of src/library/stats/man/predict.Rd, there is a missing
"be": "errors are to [be] returned".
https://github.com/r-devel/r-svn/blob/7b28ae9f8c77c7eb280eee3f4515822bb88e5c4b/src/library/stats/man/predict.Rd#L35
git blame says this has been this way for 21 years ...
I could submit a patch but that seems like overkill ...
cheers
Ben Bolker