master
src/preproc/eqn/eqn.am: Annotate sed hazard.
[grn]: Revise/parallelize usage, command synopsis.
[pre-grohtml]: Make crappy suggestion less crappy.
pic: Fix undefined behaviour, part 2.
Refactor groff's bespoke `string` class.
[eqn,pic,refer]: Clean out-of-source build trees.
[soelim]: Declare file-local functions as static.
tbl: Fix undefined behaviour.