build file copies are not in sync

TEST-UNEXPECTED-FAIL | check-sync-dirs.py | build file copies are not in sync
TEST-INFO | check-sync-dirs.py | file(s) found in:               /home/m_fujii/B2G_nexus/B2G/gecko/js/src/config
TEST-INFO | check-sync-dirs.py | differ from their originals in: /home/m_fujii/B2G_nexus/B2G/gecko/config
TEST-INFO | check-sync-dirs.py | differing file:                 ./.config.mk.swp
In general, the files in '/home/m_fujii/B2G_nexus/B2G/gecko/js/src/config'
should always be exact copies of originals in
'/home/m_fujii/B2G_nexus/B2G/gecko/config'.  A change made to one should
also be made to the other.  See 'check-sync-dirs.py' for more details.
make[2]: *** [check-sync-dirs-config] エラー 1

$ find ./gecko -name .config.mk.swp
./gecko/js/src/config/.config.mk.swp
./gecko/config/.config.mk.swp

viで開いていたので、閉じた。
$ find ./gecko -name .config.mk.swp

ビルドエラーが消えた。