use '\' instead of '+' to concatenate strings at RepositoriesFilesystemControllerTest

git-svn-id: http://svn.redmine.org/redmine/trunk@20678 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/functional/repositories_filesystem_controller_test.rb

@@ -124,8 +124,8 @@ class RepositoriesFilesystemControllerTest < Redmine::RepositoryControllerTest
         assert_response :success
         assert_select 'tr#L2 td.line-code', :text => /japanese/
         if @ruby19_non_utf8_pass
-          puts "TODO: show repository file contents test fails " +
-               "when Encoding.default_external is not UTF-8. " +
+          puts "TODO: show repository file contents test fails " \
+               "when Encoding.default_external is not UTF-8. " \
                "Current value is '#{Encoding.default_external.to_s}'"
         else
           assert_select 'tr#L3 td.line-code', :text => /日本語/