use isatty for detecting stuff for the fancy output (it doesn't work).

helpers.go

@@ -24,6 +24,7 @@ import (
 	"github.com/chzyer/readline"
 	"github.com/fatih/color"
 	jsoniter "github.com/json-iterator/go"
+	"github.com/mattn/go-isatty"
 	"github.com/mattn/go-tty"
 	"github.com/urfave/cli/v3"
 	"golang.org/x/term"
@@ -315,6 +316,10 @@ func supportsDynamicMultilineMagic() bool {
 		return false
 	}
 
+	if !isatty.IsTerminal(os.Stdout.Fd()) {
+		return false
+	}
+
 	width, _, err := term.GetSize(int(os.Stderr.Fd()))
 	if err != nil {
 		return false