ref: 930efe67e81635e632f1e6f93e1c56499c79a55f
dir: /sys/lib/troff/font/devutf/charlib/RC/
/build_RC { pop size 4 div /side exch def currentpoint newpath moveto 0 side 1.5 mul rmoveto 0 side rlineto side 2.5 mul 0 rlineto 0 side neg rlineto closepath fill } def