Problem: float2nr() is not exactly right.
Solution: Make float2nr() more accurate. Turn test64 into a new style test.
(Hirohito Higashi, closesvim/vim#1688)
863e80b445
Problem: str2nr() and str2float() do not always work with negative values.
Solution: Be more flexible about handling signs. (LemonBoy, closesvim/vim#1332)
Add more tests.
08243d26d2
Problem: On MS-Windows some float functions return a different value when
passed unusual values. strtod() doesn't work for "inf" and "nan".
Solution: Accept both results. Fix str2float() for MS-Windows. Also
reorder assert function arguments.
6247361101