* lib/uri/mailto.rb: clean up regexp [ruby-core:29894]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27731 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/mailto.rb

@@ -38,7 +38,7 @@ module URI
     # hvalue     =  *urlc
     # header     =  hname "=" hvalue
     HEADER_PATTERN = "(?:[^?=&]*=[^?=&]*)".freeze
-    HEADER_REGEXP  = Regexp.new(HEADER_PATTERN, 'N').freeze
+    HEADER_REGEXP  = Regexp.new(HEADER_PATTERN).freeze
     # headers    =  "?" header *( "&" header )
     # to         =  #mailbox
     # mailtoURL  =  "mailto:" [ to ] [ headers ]