No `showerror()` method for for the error type `Base.Meta.ParseError`.

[AlexFreik]

It seems that devs forgot to add method for showerror() for the error type Base.Meta.ParseError.

For example, when typing 5 sin I get a nice error printing:

julia> 5 sin
ERROR: syntax: extra token "sin" after end of expression

But if I type Meta.parse("5 sin") it doesn't look so good:

julia> Meta.parse("5 sin")
ERROR: Base.Meta.ParseError("extra token \"sin\" after end of expression")