C<$.> is reset when the filehandle is closed, but B<not> when an open
filehandle is reopened without an intervening close(). For more
-details, see L<perlop/"I/O Operators">. Because C<< <> >> never does
+details, see L<perlop/"IE<sol>O Operators">. Because C<< <> >> never does
an explicit close, line numbers increase across ARGV files (but see
examples in L<perlfunc/eof>).
initially consists of the arguments to any B<-I> command-line
switches, followed by the default Perl library, probably
F</usr/local/lib/perl>, followed by ".", to represent the current
-directory. If you need to modify this at runtime, you should use
+directory. ("." will not be appended if taint checks are enabled, either by
+C<-T> or by C<-t>.) If you need to modify this at runtime, you should use
the C<use lib> pragma to get the machine-dependent library properly
loaded also: