$ ruby -v
ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-darwin19]
$ bundle -v
Bundler version 2.1.4
$ cat Gemfile
source "https://rubygems.org"
gem "rerun"
$ bundle exec rerun sleep 10
[DEPRECATED] `Bundler.with_clean_env` has been deprecated in favor of `Bundler.with_unbundled_env`. If you instead want the environment before bundler was originally loaded, use `Bundler.with_original_env` (called at /Users/fukayatsu/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rerun-0.13.0/lib/rerun/notification.rb:74)
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