patch applied (ghc): Documented the Unicode tricks that are being played in the lexers

[Michael Adams]

Thu May 10 07:59:35 PDT 2007  Michael D. Adams <t-madams at microsoft.com>
  * Documented the Unicode tricks that are being played in the lexers

    M ./compiler/cmm/CmmLex.x -3 +3
    M ./compiler/parser/Lexer.x -6 +9