Consistent lock timeouts.

vfs/readervfs/api.go

@@ -28,7 +28,7 @@ var (
 )
 
 // Create creates an immutable database from reader.
-// The caller should insure that data from reader does not mutate,
+// The caller should ensure that data from reader does not mutate,
 // otherwise SQLite might return incorrect query results and/or [sqlite3.CORRUPT] errors.
 func Create(name string, reader SizeReaderAt) {
 	readerMtx.Lock()

vfs/readervfs/reader.go

@@ -37,7 +37,7 @@ func (readerVFS) FullPathname(name string) (string, error) {
 
 type readerFile struct{ SizeReaderAt }
 
-func (r readerFile) Close() error {
+func (readerFile) Close() error {
 	return nil
 }