patch applied (packages/base): Partial fix for Trac #4136

[Simon Peyton Jones]

Wed Jul  7 06:57:25 PDT 2010  simonpj at microsoft.com
  * Partial fix for Trac #4136
  
  In 'choose' (which is a library function designed specifically
  to support derived instances of Read), we must match Symbol
  as well as Ident, for nullary constructors that (wierdly) are
  symbols.

    M ./GHC/Read.lhs -2 +7

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20100707135725-1287e-1599682c82510d3ff53b81cf25d862cdc24daf49.gz