Check if an Rd fragment represents a newline character
Rdo_is_newline(rdo)
TRUE or FALSE
an Rd object
Georgi N. Boshnakov
This is a utility function that may be used to tidy up Rd objects.
It returns TRUE if the Rd object represents a newline
character, i.e. it is a character vector of length one containing the
string "\n"
. Attributes are ignored.
Otherwise it returns FALSE.