Examples to use `#any`

[notramo]

Please provide some examples of how to use #any.

[ThatsJustCheesy]

e.g.

any_char = any(Char)
any_int = any(Int32)

puts any_char.parse(['a'])
puts any_int.parse([10])

Output:

a
10

The only way to make these fail is providing a wrong number of tokens:

puts any_char.parse([] of Char)
puts any_char.parse(['a', 'b'])

Output:

ParseError: expected anything, but found end of input
ParseError: expected end of input, but found b

I'll add this to the doc comment later. Please leave this issue open so I can remember, thanks!