termstatus: flush output before returning OutputRaw() writer

This prevents mangling the output due to delayed messages.

internal/ui/termstatus/status.go

@@ -180,6 +180,7 @@ func (t *Terminal) OutputWriter() io.Writer {
 // other option. Must not be used in combination with Print, Error, SetStatus
 // or any other method that writes to the terminal.
 func (t *Terminal) OutputRaw() io.Writer {
+	t.Flush()
 	return t.wr
 }
 

internal/ui/termstatus/status_test.go

@@ -124,7 +124,8 @@ func TestReadPasswordTerminal(t *testing.T) {
 func TestRawInputOutput(t *testing.T) {
 	input := io.NopCloser(strings.NewReader("password"))
 	var output bytes.Buffer
-	term := New(input, &output, io.Discard, false)
+	term, cancel := Setup(input, &output, io.Discard, false)
+	defer cancel()
 	rtest.Equals(t, input, term.InputRaw())
 	rtest.Equals(t, false, term.InputIsTerminal())
 	rtest.Equals(t, &output, term.OutputRaw())