2√2 does not work

[knuesel]

Surprised to find the following doesn't work:

julia> 2√2
ERROR: syntax: extra token "√" after end of expression

(while 2sqrt(2) does).

[ehgus]

I have futher tested in julia 1.5.4 (and very recent version from git repository).

redefining "√" to "f"

julia> f(x) = √x
f (generic function with 1 method)
julia> 2f(2)
2.82842712474619032

adding parenthesis to "√" call

julia> √(2)
1.4142135623730951
julia> 2√(2)
ERROR: syntax: extra token "√" after end of expression
Stacktrace:
 [1] top-level scope at none:1

I think parser do not treat "√" as normal function and that's the problem