accepting only the ASCII digits '0'..'9', and only '.' as decimal point
character.
If ENDPTR is not NULL, set *ENDPTR to point to the first byte beyond the
- parsed number or to NPTR if the string does not start with a parseable
+ parsed number or to NPTR if the string does not start with a parsable
number.
Return value:
- If successful, return the value as a double or 'long double',