Faraday::ConnectionFailed if proxy: "" is passed on Ruby 3.2.1

[exoego]

Basic Info

• Faraday Version: 1.10.3 and 2.7.4
• Ruby Version: 3.2.1
• adapter: default (net_http)

Issue description

Faraday raises Faraday::ConnectionFailed if proxy: "" is passed to Faraday.new on Ruby 3.2.1.
Same code works for Ruby 2.7.6, Ruby 3.0.0 and Ruby 3.1.3.

Steps to reproduce

Ruby 2.7.6, Ruby 3.0.0 and Ruby 3.1.3:

irb(main):001:0> require "faraday"
=> true
irb(main):002:0> Faraday.new(url: "http://google.com", proxy:"").get.status
=> 301

But in Ruby 3.2.1:

irb(main):006:0> require "faraday"
=> true
irb(main):006:0> Faraday.new(url: "http://google.com", proxy:"").get.status
/Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/net/http.rb:1271:in `initialize': Failed to open TCP connection to :80 (Connection refused - connect(2) for "" port 80) (Faraday::ConnectionFailed)              
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/net/http.rb:1271:in `open'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/net/http.rb:1271:in `block in connect'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/timeout.rb:189:in `block in timeout'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/timeout.rb:196:in `timeout'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/net/http.rb:1269:in `connect'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/net/http.rb:1248:in `do_start'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/3.2.0/net/http.rb:1237:in `start'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-net_http-3.0.2/lib/faraday/adapter/net_http.rb:112:in `request_with_wrapped_block'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-net_http-3.0.2/lib/faraday/adapter/net_http.rb:102:in `perform_request'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-net_http-3.0.2/lib/faraday/adapter/net_http.rb:66:in `block in call'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.7.4/lib/faraday/adapter.rb:45:in `connection'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-net_http-3.0.2/lib/faraday/adapter/net_http.rb:65:in `call'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.7.4/lib/faraday/request/url_encoded.rb:25:in `call'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.7.4/lib/faraday/rack_builder.rb:153:in `build_response'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.7.4/lib/faraday/connection.rb:444:in `run_request'
        from /Users/exoego/.asdf/installs/ruby/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.7.4/lib/faraday/connection.rb:200:in `get'
        ... 4 levels...```