[5.3] Update BladeCompiler.php to change protected function stripParentheses to public

[ricardogobbosouza]

Function stripParentheses very helpfull in blade extensions

Blade::directive('example', function($expression) {
    $expression = Blade::stripParentheses($expression); // protected
    return "<?php echo example($expression); ?>";
});

@example('foo', 'bar')

[GrahamCampbell]

Maybe we could bind these closures to the compliler so you could just do $this->stripParentheses. That would need to go to 5.4 though. What do you think @taylorotwell?

[yajra]

@ricardogobbosouza I think the default behavior of blade automatically strips the parentheses from the expression? Trying to upgrade my project to 5.3 and this behavior breaks my custom directives.

https://laravel.com/docs/5.3/upgrade

[ricardogobbosouza]

@yajra In version 5.3 yes, the parentheses are automatically removed.
But this function can be very useful in other cases