local hub project filesystem watching -- edge case where editor might not see latest version of file from disk.

Try this in a terminal with the given file open:

```
echo "foo" >> x; sleep .5; echo "foo2" >> x; sleep .1; echo "foo3" >> x
```

It might not notice the very last foo3.  The fix is probably to change smc-project to always do one extra check the "interval" after the last one to see if anything changed.  Or maybe the issue is in syncstring.  
