Saving data on watch for transfer to phone via browser later

Interesting that .readLine() returns the newline char at the end - if there is.

I seemed to recall that's what C does, which is why I kept it: https://linux.die.net/man/3/getline

What about a .seek

That could be added, but these are really meant as text files, so seek isn't that much use in this case. Either way you couldn't seek and then write (it'd be for reading only).