Previously, only `,` was a valid delimiter, but it's also common to have e.g. tab or semicolon. Only single characters are supported as delimiters. A few characters are not allowed because they have other meanings: `\n`, `\r`, `"`, `\\`. Note: The best way to get a tab character is the use the Special Characters node currently. Pull Request: https://projects.blender.org/blender/blender/pulls/135468