End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Numeric#conj

num.conj → self

static VALUE
numeric_conj(VALUE self)
{
    return self;
}

Returns self.

See also #conjugate #coerce #clone #denominator also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0