Update functions.jl

[DrDrDrDrDrAlhazenEuler]

The "show" method did not function properly in Julia 1.10.5; the if clause should have been unnecessary anyhow, because Julia allows overloading and x is explicitly specified to be a BigRational.

[Liozou]

Thanks for the contribution and sorry for the delay! Would you mind explaining what isn't properly working with the current show method?

For context, as the documentation of show specifies:

The representation used by show generally includes Julia-specific formatting and type information, and should be parseable Julia code when possible.

This is the reason why BigRational(12, 5) for example is represented by BigRational(12,5) and not 12//5, otherwise the representation of BigRational(12, 5) would lose the type information.
However, when showing an array, the type information can be put externally, which is why, with the current representation, show([BigRational(12, 5), BigRational(7)]) displays BigRational[12//5, 7//1].
This is the same reason why show(Bool(1)) displays true and show([Bool(1), Bool(0)]) displays Bool[1, 0].

By the way, most of the contents of this package has been moved upstream: you can now access GMP's rational functions from the Base.GMP.MPQ module, operating on Rational{BigInt}. I'm happy of course if this package can still be useful, but if you only need the most basic operations, you should probably simply use the Rational{BigInt} type instead.