ima1zumi ESM, inc. Ruby on Rails engineer irb, reline, rurema contributor Learning about character codes out of curiosity 2 [1] 1. Japanese Ruby Reference Manual: https://docs.ruby- lang.org/ja/latest/doc/index.html Reason for talking The bug fix in reline Bug Fix※ ※Some terminals will not display correctly. 😢 Because ZWJ(U+200D) is sometimes not supported. 1. https://github.com/ruby/reline/pull/