bug#15859: 24.3.50; Calc - dimensionless units again

[Michael Heerdegen]

Roland Winkler <winkler@gnu.org> writes:

> I suggest to revert the changes of the command `calc-convert-units' and
> go back to its old definition.

I would like to know what the changes since then tried to accomplish/fix
and what we loose when we revert to the old definition.

> (defun calc-convert-units (&optional old-units new-units)
>   (interactive)
> [...]

Reverting only that definition does not fix your
"convert 7m / (c s) to in / (c hr)" example.

Michael.