They are unnecessary, distracting and cause ugliness on command line.

10 lat temu · 5fd60d83e6
--- a/bin/autotest.pl
+++ b/bin/autotest.pl
--- a/bin/bd.pl
+++ b/bin/bd.pl
--- a/bin/mkexec.pl
+++ b/bin/mkexec.pl
--- a/bin/mksheet.pl
+++ b/bin/mksheet.pl
--- a/bin/pl2yml.pl
+++ b/bin/pl2yml.pl
--- a/bin/timestamp.pl
+++ b/bin/timestamp.pl
--- a/bin/watchdump.pl
+++ b/bin/watchdump.pl
--- a/bin/yml2pl.pl
+++ b/bin/yml2pl.pl