Properly compute the padding by fixing the ansi escape regexp

internal/util/util_test.go

@@ -0,0 +1,19 @@
+package util
+
+import (
+	"testing"
+
+	"github.com/fatih/color"
+	ocolor "github.com/ooni/probe-cli/internal/colors"
+)
+
+func TestEscapeAwareRuneCountInString(t *testing.T) {
+	var bold = color.New(color.Bold)
+	var myColor = color.New(color.FgBlue)
+
+	s := myColor.Sprintf("•ABC%s%s", bold.Sprintf("DEF"), ocolor.Red("GHI"))
+	count := EscapeAwareRuneCountInString(s)
+	if count != 10 {
+		t.Errorf("Count was incorrect, got: %d, want: %d.", count, 10)
+	}
+}