The preprocessor now reports errors for #'s appearing in the wrong
place, which were being triggered by this test. This test is rewritten
slightly to only report the errors we want.
- Adds a pragma to see binary output of double values (not portable)
- Print decimals that show more values, but in a portable way
(lots of portability issues)
- Expand the tests to test more double values
Note: it is quite difficult to have 100% portable tests for floating point.
The current situation works by not printing full precision, and working around
several portability issues.
