/sur/hood: fix null error
=/ meb (mergebase-hashes our desk now arak)
=/ len (lent meb)
:~ leaf/"/sys/kelvin: {<[lal num]:weft>}"
- leaf/"base hash: {?:((gth len 1) <meb> <(head meb)>)}"
+ leaf/"base hash: {?.(=(len 1) <meb> <(head meb)>)}"
leaf/"%cz hash: {<hash>}"
leaf/"remote aeon: {<aeon.arak>}"
leaf/"force on: {?:(=(~ add.rein.arak) "~" <add.rein.arak>)}"
