Fixes Mercurial adapter for JRuby (#4494, #5404).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3722 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/mercurial_adapter.rb

@@ -65,7 +65,7 @@ module Redmine
           cmd = "#{HG_BIN} -R #{target('')} root"
           root_url = nil
           shellout(cmd) do |io|
-            root_url = io.gets
+            root_url = io.read
           end
           return nil if $? && $?.exitstatus != 0
           info = Info.new({:root_url => root_url.chomp,