Apply suggestions from code review

Co-authored-by: Samuel Williams <samuel.williams@shopify.com>

Author: samuel-williams-shopify

lib/protocol/websocket/framer.rb

@@ -47,6 +47,7 @@ def flush
 			# Read a frame from the underlying stream.
 			# @returns [Frame] the frame read from the stream.
 			def read_frame(maximum_frame_size = MAXIMUM_ALLOWED_FRAME_SIZE)
+				# Read the header bytes from the stream:
 				buffer = @stream.read(2)
 
 				unless buffer and buffer.bytesize == 2
@@ -65,6 +66,7 @@ def read_frame(maximum_frame_size = MAXIMUM_ALLOWED_FRAME_SIZE)
 					raise ProtocolError, "Control opcode = #{opcode} is reserved!"
 				end
 
+				# Read the frame:
 				klass = @frames[opcode] || Frame
 				frame = klass.read(finished, flags, opcode, @stream, maximum_frame_size, buffer.getbyte(1))