Resizing the window reveals hidden values (passwords)

[ghost]

Regardless the operating system, we noticed that liner library reveals hidden values when the screen gets too narrow for both the label and input space of a hidden variable.

The method
func (s *State) tooNarrow(prompt string) (string, error)

calls func (s *State) promptUnsupported(p string) (string, error)
which then calls
linebuf, _, err := s.r.ReadLine() !!!
When this happens a hidden value is not hidden anymore.

[peterh]

Thanks for the bug report. Should be fixed in master now.