Set default closure for format path in \Illuminate\Routing\UrlGenerator::format

[AndriyVoloshin]

We are going to Laravel on our current project.
Our project is use trailing slash in url but Illuminate\Routing\UrlGenerator while formatting route path always trims it.

framework/src/Illuminate/Routing/UrlGenerator.php

Line 575 in 5a8585a

public function format($root, $path, $route = null)

    public function format($root, $path, $route = null)
    {
        $path = '/'.trim($path, '/');

        if ($this->formatHostUsing) {
            $root = call_user_func($this->formatHostUsing, $root, $route);
        }

        if ($this->formatPathUsing) {
            $path = call_user_func($this->formatPathUsing, $path, $route);
        } else {
            $path = rtrim($path, '/');
        }

        return $root.$path;
    }