add Socket::Option#inspect

without this, mirb dies.
https://github.com/mruby/mruby/pull/2666

1 files changed, 1 insertions, 1 deletions

diff --git a/mrblib/socket.rb b/mrblib/socket.rb
index 732a6db8e..b8f10befd 100644
--- a/mrblib/socket.rb
+++ b/mrblib/socket.rb
@@ -557,7 +557,7 @@ class Socket
     end
 
     def inspect
-      # notyet
+      "#<Socket::Option: family:#{@family} level:#{@level} optname:#{@optname} #{@data.inspect}>"
     end
 
     def int