Comment re dimensions in lengths().

git-svn-id: https://svn.r-project.org/R/trunk@88895 00db46b3-68df-0310-9c12-caf00c1e9a41

Author: kalibera

src/library/base/man/lengths.Rd

@@ -57,6 +57,7 @@ airquality$avgOz <- rep(unlist(avgOz, use.names=FALSE), lengths(l))
 airquality$avgOz <- unsplit(avgOz, airquality$Month)
 
 ## should always be true, except when a length does not fit in 32 bits
+## or l has dimensions
 stopifnot(identical(lengths(l), vapply(l, length, integer(1L))))
 
 ## empty lists are not a problem