Make bash integration tests more robust on macOS

tools/cmd/run_shell/main.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 
 	"kitty/tools/cli"
+	"kitty/tools/tty"
 	"kitty/tools/tui"
 	"kitty/tools/tui/shell_integration"
 )
@@ -68,6 +69,9 @@ func main(args []string, opts *Options) (rc int, err error) {
 	return
 }
 
+var debugprintln = tty.DebugPrintln
+var _ = debugprintln
+
 func EntryPoint(root *cli.Command) *cli.Command {
 	sc := root.AddSubCommand(&cli.Command{
 		Name:             "run-shell",