Prefer single line responsibility.

Author: ioquatix

lib/protocol/http2/server.rb

@@ -31,7 +31,9 @@ def read_connection_preface(settings = [])
 					send_settings(settings)
 
 					read_frame do |frame|
-						raise ProtocolError, "First frame must be #{SettingsFrame}, but got #{frame.class}" unless frame.is_a? SettingsFrame
+						unless frame.is_a? SettingsFrame
+							raise ProtocolError, "First frame must be #{SettingsFrame}, but got #{frame.class}"
+						end
 					end
 				else
 					raise ProtocolError, "Cannot read connection preface in state #{@state}"