fails(JRUBY-3275):ARGF.binmode returns self
fails(JRUBY-3275):ARGF.close closes the current open stream
fails(JRUBY-3275):ARGF.gets modifies the files when in place edit mode is on
fails(JRUBY-3275):ARGF.gets modifies and backups two files when in place edit mode is on
fails(JRUBY-3275):ARGF.readline modifies the files when in place edit mode is on
fails(JRUBY-3275):ARGF.readline modifies and backups two files when in place edit mode is on
I did break FOR in RubyInstantConfig, I'm not 100% sure that's right.
I wasn't able to test this on windows.