remove trailing white-spaces from test/unit/lib/redmine/configuration_test.rb.
remove trailing white-spaces from test/unit/testing_test.rb.
remove trailing white-spaces from test/unit/time_entry_activity_test.rb.
remove trailing white-spaces from test/unit/project_nested_set_test.rb.
remove trailing white-spaces from test/unit/query_test.rb.
remove trailing white-spaces from test/unit/role_test.rb.
remove trailing white-spaces from test/unit/helpers/sort_helper_test.rb.
remove trailing white-spaces from test/unit/principal_test.rb.
remove trailing white-spaces from test/unit/helpers/search_helper_test.rb.
remove trailing white-spaces from test/unit/wiki_redirect_test.rb.
