A screenshot of gitea showing the diff between two URLs with the second one replacing the letter 'g' with the Armenian Small Letter Co, looking like latin 'g'. gitea highlights the change with a yellow warning triangle and a tooltop saying "This line has ambiguous unicode characters".
https://files.mastodon.social/media_attachments/files/114/496/048/665/589/283/original/8114f7169a3ceb0d.png