Unicode has rendered analogs, U+241C-U+241F, but they take more bytes to encode, which can significantly increase file size in large USV files.
So my ideal would be to use ASV files rendered as USV in editors.
https://github.com/SixArm/usv
Here's an example of what a USV looks like:
Folio1␟␞ Sheet1␟␞ a␟b␟␞ c␟d␟␞ ␝ Sheet2␟␞ e␟f␟␞ g␟h␟␞ ␝␜ Folio2␟␞ Sheet3␟␞ a␟b␟␞ c␟d␟␞ ␝ Sheet4␟␞ e␟f␟␞ g␟h␟␞ ␝␜
Unicode has rendered analogs, U+241C-U+241F, but they take more bytes to encode, which can significantly increase file size in large USV files.
So my ideal would be to use ASV files rendered as USV in editors.
https://github.com/SixArm/usv