hi
in the manual is written:
Assignments are of the form: key=value

but that didn't work for me. i downloaded the source and had a look at
the example rc.
there, every pair is "key = value" with spaces between the equal sign.
that worked.
i think that this should be corrected.

also, the online manual page is missing keys, or at least one:
use_radians

greetings from switzerland
jb