These are the original names of the commands in GNU Readline. Adding these aliases allows existing `.inputrc` files which reference these commands to work properly.
See Mon-Ouie/pry-remote#49 . When we translate Proc object with drb, proc is wrapped with DRbObject. In this case defined? proc.call is not delegated to proc self. But proc.respond_to? :call is delegated to proc self. So here it is better to check `proc.respond_to? :call`.
… readline.rb is required on Windows
Tested-by: Mark Somerville <firstname.lastname@example.org> [Arch, MRI 2.0.0] Signed-off-by: Mark Somerville <email@example.com>