Files promises should automatically escape space in name

If i'm trying to edit a file in "c:\Program Files\some\path\to\file", if I forget to escape the space or quote the whole string, the agent ends up trying to edit file c:\Program
This makes no sense, as the promiser in files: promise is always a single item - it should be automatically escaped

Exist at least on Windows on 3.6, need to test on 3.7