update doc for nl-in and nl-out

Author: nxadm

doc/Language/5to6-perlvar.pod

@@ -424,18 +424,17 @@ filehandle. E. g. C<$*IN.ins>.
 
 =item $/
 
-This is accessed through the C<.nl> method on the filehandle. E. g.
-C<$*IN.nl>.
+This is accessed through the C<.nl-in> method on the filehandle. E. g.
+C<$*IN.nl-in>.
 
 =item $OUTPUT_RECORD_SEPARATOR
 
 =item $ORS
 
 =item $\
 
-[NEEDS FURTHER RESEARCH] The <.nl> method on the filehandle (e. g.
-C<$*OUT.nl>) I<appears> to give the output record separator, but this is
-currently not clear.
+This is accessed through the C<.nl-in> method on the filehandle. E. g.
+C<$*OUT.nl-out>.
 
 =item $OUTPUT_AUTOFLUSH