[ruby/net-http] Fix on 2.7

https://github.com/ruby/net-http/commit/5194fd541e
2023-08-14 11:17:00 -04:00 · 2023-08-14 11:17:00 -04:00 · 70da92cdf7
commit 70da92cdf7
parent 4d21134f3f
1 changed files with 1 additions and 1 deletions
--- a/lib/net/http.rb
+++ b/lib/net/http.rb
@ -1615,7 +1615,7 @@ module Net   #:nodoc:
                                      write_timeout: @write_timeout,
                                      continue_timeout: @continue_timeout,
                                      debug_output: @debug_output)
-          buf = "CONNECT #{conn_address}:#{@port} HTTP/#{HTTPVersion}\r\n"
+          buf = +"CONNECT #{conn_address}:#{@port} HTTP/#{HTTPVersion}\r\n"
          buf << "Host: #{@address}:#{@port}\r\n"
          if proxy_user
            credential = ["#{proxy_user}:#{proxy_pass}"].pack('m0')