[ruby-dev:52013] [Ruby master Feature#19193] drop DOS TEXT mode support

Issue #19193 has been reported by YO4 (Yoshinao Muramatsu). ---------------------------------------- Feature #19193: drop DOS TEXT mode support https://bugs.ruby-lang.org/issues/19193 * Author: YO4 (Yoshinao Muramatsu) * Status: Open * Priority: Normal ---------------------------------------- On Windows platform, ```File.open(path, "r")``` returns an object different from "rt" and "rb". I call that DOS TEXT mode here. DOS TEXT mode does * crlf conversion * 0x1a treated EOF charactor on read and others (see Bug #19192). But DOS TEXT mode is almost unnecessary today and it seems to introduce lot of code complexities. Now there is less need for dos text mode * Microsoft's most apps works without CRLF newline. * Creating a crlf text file today should be explicit. (but that is default mode on windows now) * Interpreting EOF charactor can cause trouble. I think it's time to consider dropping DOS TEXT mode. What challenges are there and what preparation is needed? -- https://bugs.ruby-lang.org/