Replace someone's domain fallingsnow.net with our domain ruby-lang.org.

Because we want to predict the behavior of the domain in the spec test.

Author: junaruga

library/socket/ipsocket/getaddress_spec.rb

@@ -19,7 +19,7 @@
   # traditionally invalidly named ones.
   it "raises an error on unknown hostnames" do
     -> {
-      IPSocket.getaddress("rubyspecdoesntexist.fallingsnow.net")
+      IPSocket.getaddress("rubyspecdoesntexist.ruby-lang.org")
     }.should raise_error(SocketError)
   end
 end