[dev-context] latest beta (tests needed)

[Duncan Hothersall]

> * The xtag-mml patch.
> * The \dodoregister patch.
> 
> Duncan, can you check if these last two items are ok now?

I think line 504 of xtag-mmp.tex needs to be reversed:
\let\pMULTISCRIPTmmlPOST\pMULTISCRIPTmmlPRE
rather than
\let\pMULTISCRIPTmmlPRE\pMULTISCRIPTmmlPOST
because the definition above is \pMULTISCRIPTmmlPRE
?

The \dodoregister patch looks fine in my tests.

Thanks,

Duncan