tildes

I'm using awkiawki-0.1-PRE2, and I recently noticed that pages can't
contain tilde (~) characters -- they get turned into spaces.  Not
knowing awk, I don't know where to look for the problem.

-- 
           /|_     .-----------------------.                        
         ,'  .\  / | No to Imperialist war |                        
     ,--'    _,'   | Wage class war!       |                        
    /       /      `-----------------------'                        
   (   -.  |                               
   |     ) |                               
  (`-.  '--.)                              
   `. )----'                               


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