Define an accent, to be put on top of other glyphs, in the encoding encoding at the location slot.
A slot is the number identifying a glyph within a font.
This line from t1enc.def declares that to make a circumflex
accent as in
\^A, the system will put the accent in slot 2
over the ‘A’ character, which is represented in ASCII as 65.
(This holds unless there is a relevant
If cmd has already been defined then
does not give an error but it does log the redefinition in the