unicode as valid naming symbols

[Gregory Ewing]

Mark H Harris wrote:
>> Good ol infix -- x+y..
>> prefix (with paren) -- foo(x)
>> prefix without  -- ¬ x
>> In case you thought alphanumerics had parens --  sin x
>> Then theres postfix   -- n!
>> Inside fix   -- nCr (Or if you prefer ⁿCᵣ ??)
>> And outside fix -- mod -- |x|

And mismatched delimiters:

    [5, 7)

    |x>

-- 
Greg