test-init: replace 'echo -n' with 'printf'
The '-n' argument to echo is a non-standard extension that isn't
supported on Mac OS X 10.6.
#!/usr/bin/env python
from hgext import color
# ensure errors aren't buffered
testui = color.colorui()
testui.pushbuffer()
testui.write('buffered\n')
testui.warn('warning\n')
testui.write_err('error\n')
print repr(testui.popbuffer())