maildir: avoid redundant slashes

Redundant slashes look ugly in strace(1) output.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/PublicInbox/MdirReader.pm b/lib/PublicInbox/MdirReader.pm
index 06806e80..30e6f8ad 100644
--- a/lib/PublicInbox/MdirReader.pm
+++ b/lib/PublicInbox/MdirReader.pm
@@ -42,7 +42,7 @@ my %c2kw = ('D' => 'draft', F => 'flagged', R => 'answered', S => 'seen');
 sub maildir_each_eml ($$;@) {
         my ($dir, $cb, @arg) = @_;
         $dir .= '/' unless substr($dir, -1) eq '/';
-        my $pfx = "$dir/new/";
+        my $pfx = $dir . 'new/';
         if (opendir(my $dh, $pfx)) {
                 while (defined(my $bn = readdir($dh))) {
                         next if substr($bn, 0, 1) eq '.';
@@ -53,7 +53,7 @@ sub maildir_each_eml ($$;@) {
                         $cb->($f, [], $eml, @arg);
                 }
         }
-        $pfx = "$dir/cur/";
+        $pfx = $dir . 'cur/';
         opendir my $dh, $pfx or return;
         while (defined(my $bn = readdir($dh))) {
                 my $fl = maildir_basename_flags($bn) // next;