[abcusers] Agreed resolutions

[Bryancreer]

A while ago James Allwright said -

>The problem of abritrary text has come up before and "_  " is the agreed
>syntax for arbitrary text

and more recently -

>This was resolved ages ago. Q:120 takes the value of unit note length
>from the header. If there is a new L: field in the body of the tune,
>the tempo does not change with it ...

Are these agreements (and others?) documented anywhere?

Bryan Creer