patch applied (ghc): Improve error message for malformed LANGUAGE pragma

[Tim Chevalier]

Sun Apr  6 13:23:33 PDT 2008  Tim Chevalier <chevalier at alum.wellesley.edu>
  * Improve error message for malformed LANGUAGE pragma
  
  I made the error (which previously said "cannot parse LANGUAGE
  pragma") slightly more helpful by reminding the user that pragmas
  should be comma-separated.

    M ./compiler/main/HeaderInfo.hs -2 +3

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20080406202333-d61e2-ee51691aa2297332e2f955153908e783ce78c706.gz