fix var_export of namespace names

[eric-therond]

No description provided.

[nikic]

Not sure I understand the motivation for this change. Currently it's printed in a way that makes the literal a valid string. In these particular examples it happens to not be strictly necessary, but it would be if the string were '\\' for example.

[eric-therond]

@nikic the problem I faced is that literal are printed with var_export, that keep escape chars, example:

    Stmt_Class
        name: LITERAL('NS\\NameOfClass')
        extends: LITERAL('X')
        implements[0]: LITERAL('NS\\Iface')
        stmts: Block#3

while function names are printed without var_export:

Function NS\NameOfClass::doSomething(): mixed
Block#1
    Terminal_Echo
        expr: LITERAL('Hello World')
    Terminal_Return

so there is an inconsistency in the class names (NS\NameOfClass and NS\\NameOfClass on other side).

Maybe this solution is more correct?
change line 25 to:

$name = var_export($func->getScopedName(), true);

[ircmaxell]

That second change seems more inline, it'll make the function name a string as well as escaping more consistently. +1 from me.

[eric-therond]

looking good now on your side @nikic @ircmaxell ?