[pdftex] Tilde character in url.

[Reinhard Kotucha]

On 9 April 2010 John Culleton wrote:

 > In plain pdftex I am typing the following url:
 > \url{http://www.tux.org/~milgram/bookland}
 > {http://www.tux.org/~milgram/bookland}
 > 
 > The problem is the tilde character.  TeX persists in treating it
 > either as an unbreakable space or as an accent over the following
 > character.  The tag \tilde only works in math mode and again it
 > wants to be on top of the next character.

The tilde is an active character.

\bgroup\catcode`\~=12
  \url{http://www.tux.org/~milgram/bookland}
  {http://www.tux.org/~milgram/bookland}
\egroup

You can also try \~{}.  The empty group prevents TeX from putting it
over the following character.

Regards,
  Reinhard

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