[ruby/irb] Reword history file documentation and fix typo (https://github.com/ruby/irb/pull/842)
https://github.com/ruby/irb/commit/bbabf818c7
[ruby/irb] Reword history file documentation and fix typo
(https://github.com/ruby/irb/pull/842)
https://github.com/ruby/irb/commit/bbabf818c7