Merge pull request #73 from chenminjian/fix/same-file

fix: not remove file by mistakes

ops.go

@@ -73,6 +73,10 @@ func Mv(r *Root, src, dst string) error {
 		return err
 	}
 
+	if srcDir == dstDirStr && srcFname == filename {
+		return nil
+	}
+
 	return srcDirObj.Unlink(srcFname)
 }