Test input filtering to be idempotent

Ok, the encoding logic itself is not "idempotent", BUT it doesn't actually need to be, as the encoding SHOULD only run once:

      if (strpos($href, 'mailto:') === 0) {
        $atag->setAttribute('href', $href);

        $text = $this->replaceMailtoLinks($document->saveHTML($atag), $altered);
        $this->replaceDomNode($atag, $text);
      }

We only encode, if there is a "mailto" at the start of a href, otherwise strpos returns false, and we won't jump inside the if case. I'll do some further investigation.

Re #4 please see the other issues, before working on fixes yourself. Like 🐛 Fix Email address being removed in the link text and fix every second link not being obfuscated Fixed .

But first let's have tests for idempotency!

Everything seems to be idempotent! Please review!

RTBC! Super nice work! Just 1 comment for the comment ;)

All tests are green! Merged.

Automatically closed - issue fixed for 2 weeks with no activity.