irb Rake::Application#help messes up readline

[julien.thewys]

Hi,

config: ruby 1.8.4, irb 0.9.5 (with inputrc.euro env)

First reproduce this:

irb(main):001:0> help "help"

Output is OK. But now use up arrow to display last command (help
"help"), then try to just delete the space (to make it like
help"help"). Well it does not work for me, this is what I get:

irb(main):002:0"help" "help"

Does someone have a fix?