Improve documentation consistency.

Author: samuel-williams-shopify

lib/protocol/http/header/multiple.rb

@@ -35,7 +35,7 @@ def self.coerce(value)
 					end
 				end
 
-				# Initializes the multiple header with already-parsed values.
+				# Initializes the multiple header with the given values.
 				#
 				# @parameter value [Array | Nil] an array of header values, or `nil` for an empty header.
 				def initialize(value = nil)

lib/protocol/http/header/split.rb

@@ -38,9 +38,9 @@ def self.coerce(value)
 					end
 				end
 
-				# Initializes a `Split` header with already-parsed values.
+				# Initializes a `Split` header with the given values.
 				#
-				# @parameter value [Array | Nil] an array of parsed header values, or `nil` for an empty header.
+				# @parameter value [Array | String | Nil] an array of values, a raw header value, or `nil` for an empty header.
 				def initialize(value = nil)
 					if value.is_a?(Array)
 						super(value)