Hi,I'm working in latest Pharo (30577) with STON (bleeding edge) and I get MNU:SmallInteger>>isSeparator when I evaluate the code below. Is my code wrong? The idea is to make my test suite work in the memory file system.| fileSystem |fileSystem := FileSystem memory.(fileSystem / 'file.txt') ensureCreateFile.STON writeron: (fileSystem / 'file.txt') writeStream;nextPut: 'hi'.STON readeron: (fileSystem / 'file.txt') readStream;next.Thanks in advance.Mart�n