watchman: code formatting fixup
watchman: code formatting fixup

Summary: No functional change

Reviewed By: chadaustin

Differential Revision: D15247695

fbshipit-source-id: 57e3167aca0b05e3a009694c6cbecb0d52fce9ed

facebook/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,wez/watchman,nodakai/watchman,wez/watchman,nodakai/watchman,wez/watchman,facebook/watchman,nodakai/watchman,wez/watchman,facebook/watchman,nodakai/watchman,wez/watchman,facebook/watchman,wez/watchman,facebook/watchman,facebook/watchman,wez/watchman,wez/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,wez/watchman