Issue #11729 has been reported by Tatsuya Otsuka. ---------------------------------------- Bug #11729: String#split(nil) incorrectly uses $; https://bugs.ruby-lang.org/issues/11729 * Author: Tatsuya Otsuka * Status: Open * Priority: Normal * Assignee: * ruby -v: ruby 2.3.0dev (2015-11-21 trunk 52698) [x86_64-darwin14] * Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN ---------------------------------------- Hi, Is this intentional? ``` $; = "@" "a@b".split(nil) # => ["a", "b"] ``` I expect `["a@b"]` because I found the following sentence in the Japanese documentation. ``` 1 バイトの空白文字 ' ' か nil 先頭と末尾の空白を除いたうえで、空白文字列で分割する。 ``` http://docs.ruby-lang.org/ja/2.2.0/method/String/i/split.html -- https://bugs.ruby-lang.org/