Drop support for obsolete attributes: version and comment.

README.md

@@ -77,6 +77,17 @@ equivalent using `HTTP::Cookie`:
         cookies1 = HTTP::Cookie.parse(set_cookie1, uri_or_url)
         cookies2 = HTTP::Cookie.parse(set_cookie2, uri_or_url, :logger => log)
 
+- `Mechanize::Cookie#version`, `#version=`
+
+    There is no longer a sense of version in HTTP cookie.  The only
+    version number that has ever been defined was zero, and there will
+    be no other version since the version attribute has been removed
+    in RFC 6265.
+
+- `Mechanize::Cookie#comment`, `#comment=`
+
+    Ditto.  The comment attribute has been removed in RFC 6265.
+
 - `Mechanize::Cookie#set_domain`
 
         # before

lib/http/cookie.rb

@@ -158,11 +158,8 @@ class HTTP::Cookie
   #     new("name" => "uid", "value" => "a12345", "Domain" => 'www.example.org')
   #
   def initialize(*args)
-    @version = 0     # Netscape Cookie
-
     @origin = @domain = @path =
-      @expires = @max_age =
+      @expires = @max_age = nil
-      @comment = nil
     @secure = @httponly = false
     @session = true
     @created_at = @accessed_at = Time.now
@@ -306,10 +303,6 @@ class HTTP::Cookie
                 cookie.expires = avalue unless cookie.max_age
               when 'max-age'
                 cookie.max_age = avalue
-              when 'comment'
-                cookie.comment = avalue
-              when 'version'
-                cookie.version = avalue
               when 'secure'
                 cookie.secure = avalue
               when 'httponly'
@@ -521,13 +514,6 @@ class HTTP::Cookie
     self
   end
 
-  # The version attribute.  The only known version of the cookie
-  # format is 0.
-  attr_accessor :version
-
-  # The comment attribute.
-  attr_accessor :comment
-
   # The time this cookie was created at.  This value is used as a base
   # date for interpreting the Max-Age attribute value.  See #expires.
   attr_accessor :created_at
@@ -610,9 +596,6 @@ class HTTP::Cookie
     elsif @expires
       string << "; Expires=#{@expires.httpdate}"
     end
-    if @comment
-      string << "; Comment=#{Scanner.quote(@comment)}"
-    end
     if @httponly
       string << "; HttpOnly"
     end

lib/http/cookie_jar/cookiestxt_saver.rb

@@ -80,7 +80,6 @@ class HTTP::CookieJar::CookiestxtSaver < HTTP::CookieJar::AbstractSaver
       :path => path,
       :secure => s_secure == True,
       :httponly => httponly,
-      :expires => expires,
+      :expires => expires)
-      :version => 0)
   end
 end

test/test_http_cookie.rb

@@ -102,7 +102,6 @@ class TestHTTPCookie < Test::Unit::TestCase
     assert_equal 1, HTTP::Cookie.parse(cookie_str, uri) { |cookie|
       assert_equal 'quoted', cookie.name
       assert_equal 'value', cookie.value
-      assert_equal 'comment is "comment"', cookie.comment
     }.size
   end
 
@@ -127,6 +126,7 @@ class TestHTTPCookie < Test::Unit::TestCase
   def test_parse_bad_version
     bad_cookie = 'PRETANET=TGIAqbFXtt; Name=/PRETANET; Path=/; Version=1.2; Content-type=text/html; Domain=192.168.6.196; expires=Friday, 13-November-2026  23:01:46 GMT;'
     url = URI.parse('http://192.168.6.196/')
+    # The version attribute is obsolete and simply ignored
     cookies = HTTP::Cookie.parse(bad_cookie, url)
     assert_equal 1, cookies.size
   end