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This question is an exact duplicate of:

The URL recognizer stops at the ' character, yet this is a valid character in URLs.


On a related note, wrapping the URL in <a href="..."> doesn't help either; somehow the sanitizing process filters out the URL it thinks is faulty:

<a href="'s_theorem">this is (not) a link</a>


<p>this is (not) a link</p>

(Currently: this is (not) a link.)

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marked as duplicate by Shadow Wizard, hims056, Lucifer, yhw42, Hugo Dozois Jun 4 '13 at 13:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

@Arjan: Thanks for your effort – Philip Apr 20 '11 at 8:06

Instead, wrap it in Markdown syntax:



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...or make the editor do it for you: paste the URL, select it, hit Ctrl-L, paste it again. Of course, in this very example a nice text rather than the bare URL looks better anyhow! Like: "Wikipedia explains for Rice's theorem...". So: type that nice title, select it, hit Ctrl-L, paste the URL. – Arjan Apr 20 '11 at 10:21

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