haskeline does not provide fancy line editing in ghci-6.10.1

[judah]

Using ghci-6.10.1, when Test.hs is run under ghci-6.10.1, fancy line editing is not used.

The problem does not occur in ghci-6.8.1 or with ghci-haskeline.

[judah]

The terminfo backend is used, and it appears to be a buffering problem...very strange.

[judah]

This issue is caused by a ghci bug:

http://hackage.haskell.org/trac/ghc/ticket/3009

Currently the POSIX backend only sets stdin to NoBuffering if it's not already set. We can work around this by always setting NoBuffering.

[judah]

Fix by:

Sat Feb  7 13:33:43 PST 2009  judah.jacobson@gmail.com
  * Fix #56: Always set POSIX terminal attributes.