irb is nice, because is uses readline. I can press <key-up> to bring to
life previously typed lines. That's good. But if I exist irb and then
return to it the history is gone. So it's not like bash(1) and mysql(1)
that save the history is a file. Or is it? Is it possible to make irb
save the history in a file so that I don't have to retype everything if
I restart it?
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