Added complete call-seq documentation for all Rational methods in
mrblib/rational.rb (4 methods):
## Rational Class Methods:
- inspect: returns string representation for debugging with parentheses
format, showing the rational value in "(numerator/denominator)" form
- to_s: returns string representation in "numerator/denominator" format
for display and conversion purposes
- <=>: spaceship operator for comparison with other numeric types,
returns -1/0/+1 for less/equal/greater comparisons, enables Comparable
module functionality with proper nil handling for incomparable values
## Numeric Extension Methods:
- to_r: converts any numeric value to rational representation with
denominator of 1, part of the standard numeric conversion protocol
Co-authored-by: Atlassian Rovo Dev
- define `MRB_TT_RATIONAL`
- change object structure (`struct RRational`)
- add memory management for `MRB_TT_RATIONAL`
- avoid operator overloading as much as possible
- implement division overloading in C
- as a result, performance improved a lot
- Integrate `Fixnum` and `Integer`
- Remove `Integral`
- `int / int -> int`
- Replace `mrb_fixnum()` to `mrb_int()`
- Replace `mrb_fixnum_value()` to `mrb_int_value()`.
- Use `mrb_integer_p()` instead of `mrb_fixnum_p()`
* The `Fixnum` constant is now an alias for the `Integer` class.
* Remove `struct mrb_state::fixnum_class` member.
If necessary, use `struct mrb_state::integer_class` instead.
Yukihiro "Matz" Matsumoto