tests/test-username-newline.out

use 'x in dict' instead of 'dict.has_key(x)'

"in" is faster, and has_key will be removed in py3k

adding a
abort: username 'foo\nbar1' contains a newline

abort: username 'foo\nbar2' contains a newline

transaction abort!
rollback completed
abort: username 'foo\nbar3' contains a newline!