🚀 go-pugleaf

) Here is an undocumented (at least in the documents I have) feature of tbl.
) In the format specification, if you use the letter "f" for font
) specification, tbl actually looks for TWO characters.  Thus "fBI" really
) does give bold italics.  However, it means the following example crashes,
) with mysterious messages about being unable to scan over such and such...
) 
) center;
) lfB lfB.
) data

From M. E. Lesk, "TBL - A Program to Format Tables", p. 4:

_Font changes_ - ... All font names are one or two letters; a one-letter
font name should be separated from whatever follows by a space or tab.
The single letters B, b, I, and i are shorter synonyms for fB and fI.
-- 
Col. G. L. Sicherman
UU: ...{rocksvax|decvax}!sunybcs!colonel
CS: colonel@buffalo-cs
BI: colonel@sunybcs, csdsicher@sunyabva