more descriptive comment

diff --git a/usr.sbin/pkg_add/OpenBSD/Subst.pm b/usr.sbin/pkg_add/OpenBSD/Subst.pm
index cd667bd..f863b37 100644 (file)
--- a/usr.sbin/pkg_add/OpenBSD/Subst.pm
+++ b/usr.sbin/pkg_add/OpenBSD/Subst.pm
@@ -1,5 +1,5 @@
 # ex:ts=8 sw=4:
-# $OpenBSD: Subst.pm,v 1.18 2019/07/05 06:02:29 espie Exp $
+# $OpenBSD: Subst.pm,v 1.19 2023/05/27 10:05:50 espie Exp $
 #
 # Copyright (c) 2008 Marc Espie <espie@openbsd.org>
 #
@@ -63,7 +63,7 @@ sub do
 {
        my $self = shift;
        my $s = shift;
-       return $s unless $s =~ m/\$/o;  # optimization
+       return $s unless $s =~ m/\$/o;  # no need to subst if no $
        while ( my $k = ($s =~ m/\$\{([A-Za-z_][^\}]*)\}/o)[0] ) {
                my $v = $self->{$k};
                unless ( defined $v ) { $v = "\$\\\{$k\}"; }