patch applied (cabal): Disallow tabs .cabal files with new syntax

[Duncan Coutts]

Fri Aug  3 11:12:44 PDT 2007  Thomas Schilling <nominolo at gmail.com>
  * Disallow tabs .cabal files with new syntax

    M ./Distribution/PackageDescription.hs -9 +43
    M ./Distribution/ParseUtils.hs -21 +45