Google+ button works but incorrect

When Google+ is clicked, the following URL is posted:

https://plus.google.com/share?url=“some_url”

and Simple Share Buttons Adder does not encode “some_url”

it has to be encoded or the sharing will lead to a wrong page (mostly the home page) when <some_url> contains non-English character.

Encoding <some_url> is also a requirement by Google document: https://developers.google.com/+/web/share/