patch applied (packages/base): Lazier intersperse

[Ian Lynagh]

Sat Oct  2 16:12:01 PDT 2010  Daniel Fischer <daniel.is.fischer at web.de>
  * Lazier intersperse
  A lazier implementation of intersperse, and consequentially intercalate, to
  avoid space leaks.

    M ./Data/List.hs -2 +10

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20101002231201-a0d69-4c991806e159eefb369e732ddb2df4b62d3e1124.gz