Fix lint issue with error doc string
diff --git a/fsnotify.go b/fsnotify.go
index 190bf0d..89cab04 100644
--- a/fsnotify.go
+++ b/fsnotify.go
@@ -63,4 +63,6 @@
 }
 
 // Common errors that can be reported by a watcher
-var ErrEventOverflow = errors.New("fsnotify queue overflow")
+var (
+	ErrEventOverflow = errors.New("fsnotify queue overflow")
+)