Re: complex : needless loss of precision [mostly fixed]

[Morten Welinder <mortenw gnome org>]

I have fixed the space handling in the complex number parsing and added
a test sheet that shows that we match what Excel does, except for:

1. When things don't parse we return #VALUE whereas Excel returns #NUM.

2. We do not allow "1,000i", i.e., the use of a thousands separator.

3. We do allow "+ j".  That looks like an Excel bug as they do allow "+ 1j" and
"+ 1 j".

(1) Somehow needs to be fixed at some point.

Morten