langswitcher.hreflang.html.twig displays incorrect urls when Grav is configured to generate absolute urls

[shauser67]

I have configure Grav to generate absolute urls (absolute_urls: true). In this case the template langswitcher.hreflang.html.twig displays incorrect urls with duplicate base (e.g. http://www.example.comhttp://www.example.com/en/example).

As a solution, uri.base should be added to the url only if absolute_urls is set to false:

{% if config.system.absolute_urls %}
    {% set href_url = lang_url ~ uri.params ~ (uri.query|length > 1 ? '?' ~ uri.query) %}
{% else %}
    {% set href_url = uri.base ~ lang_url ~ uri.params ~ (uri.query|length > 1 ? '?' ~ uri.query) %}
{% endif %}

Furthermore there is an error in line 12: config.languages.include_default_lang doesn't exist and should be replaced by config.system.languages.include_default_lang.