Gregory's ServerA 4 panel meme comic titled "Tabs vs Spaces", in which a person is depicted rejecting the contents of an adjacent blank panel on the first row, followed by the same person expressing approval for another blank panel on the second row.
This joke relies on visual ambiguity between tabs and spaces, neither of which are discernable from the blank background in the panels. It remains uncertain whether the person approves of tabs vs spaces.
@ellie Thank you! Just found out you can edit image descriptions now, so I added your text.