[PATCH 03/10] lei_mail_sync: simplify group2folders

[Eric Wong]

No need to loop when we can rely on grep.
---
 lib/PublicInbox/LeiMailSync.pm | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/PublicInbox/LeiMailSync.pm b/lib/PublicInbox/LeiMailSync.pm
index bf8fb7de..56468c78 100644
--- a/lib/PublicInbox/LeiMailSync.pm
+++ b/lib/PublicInbox/LeiMailSync.pm
@@ -350,9 +350,7 @@ EOM
                } else {
                        @inc = @all;
                }
-               for (@inc) {
-                       push(@$folders, $_) unless $seen{$_}++;
-               }
+               push(@$folders, (grep { !$seen{$_}++ } @inc));
        }
        scalar(@$folders) || $lei->fail(<<EOM);
 no --mail-sync folders known to lei
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