* lib/uri/generic.rb: [DOC] Fix typo

s/arguement/argument/

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43918 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/generic.rb

@@ -672,7 +672,7 @@ module URI
     # u.hostname = "::1"
     # p u.to_s                  #=> "http://[::1]/bar"
     #
-    # If the arguement seems IPv6 address,
+    # If the argument seems IPv6 address,
     # it is wrapped by brackets.
     #
     def hostname=(v)