https://github.com/ruby/io-wait/commit/62626dae8c

https://github.com/ruby/io-wait/commit/dad4c70f2a

https://github.com/ruby/io-wait/commit/1decadc7f9

the gem a noop on Rubies older than
2.6"

This reverts commit https://github.com/ruby/io-wait/commit/75fcb74c327f.

The version that does nothing with pre-ruby 2.6 has already been
released, so there is no longer need to consider older rubies in newer
versions.

https://github.com/ruby/io-wait/commit/930d2f0d07

https://github.com/ruby/io-wait/commit/48309d7877

(https://github.com/ruby/io-wait/pull/25)

https://github.com/ruby/io-wait/commit/e5854b46c7

Ref: https://github.com/mikel/mail/pull/1439

Some gems depend on io-wait, but still support older rubies,
so they have to chose between droping support or not listing io-wait.

But io-wait could act a a noop on older rubies.

https://github.com/ruby/io-wait/commit/75fcb74c32

https://github.com/ruby/io-wait/commit/898248931f

g -L frozen_string_literal ext/**/*.rb|xargs ruby -Ka -e'ARGV.each{|fn|puts
fn;open(fn,"r+"){|f|s=f.read.sub(/\A(#!.*\n)?(#.*coding.*\n)?/,"\\&#
frozen_string_literal: false\n");f.rewind;f.write s}}'

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53143 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  cygwin.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19947 b2dd03c8-39d4-4d8f-98ff-823fe69b080e