Sync creates weird file names

[cebe]

yii fs/sync s3://exports/a_03 local://exports/a_03

results in the following file structure:

$ find /mnt/storage/
/mnt/storage/
/mnt/storage/exports
/mnt/storage/exports/a_03exports
/mnt/storage/exports/a_03exports/a_03
/mnt/storage/exports/a_03exports/a_03/a_03.html

• /mnt/storage/ is local://

I'd expect this to create the following instead:

$ find /mnt/storage/
/mnt/storage/
/mnt/storage/exports
/mnt/storage/exports/a_03
/mnt/storage/exports/a_03/a_03.html