Dear Maintainer,

'wcalc' mixes the terms "engineering notation" and "scientific
notation", even though the only notation available is "scientific". The
option to enable scientific notation is called "engineering" in the
configuration file and the manual, and the documentation claims that it
enables engineering notation when it does not. This is confusing, and I
think that all references to "engineering notation" should be replaced
with "scientific notation", and the configuration option deprecated and
renamed.

Even better, an actual engineering notation could be implemented, which
is why I originally tried to enable this feature!

The difference between "engineering" and "scientific" notation can be
found here: https://en.wikipedia.org/wiki/Engineering_notation

In short: It's like scientific but the exponents must be divisible by
three.