decrypt/decr | 2 1 + 1 - 0 !
decrypt/encrypt | 1 1 + 0 - 0 !
examples/filtdef | 2 1 + 1 - 0 !
examples/filtuu | 1 1 + 0 - 0 !
4 files changed, 4 insertions(+), 2 deletions(-)

 apply #!/usr/bin/perl to all installed perl scripts

Makefile.PL | 4 2 + 2 - 0 !
1 file changed, 2 insertions(+), 2 deletions(-)

 disable in-place editing in makefile.pl

Makefile.PL | 15 15 + 0 - 0 !
1 file changed, 15 insertions(+)

 install perlfilter manual page in section 1, not 3

decrypt/decrypt.pm | 5 5 + 0 - 0 !
1 file changed, 5 insertions(+)

 refer to encryption/decryption scripts from filter::decrypt(3pm)