I've noticed that on three occasions now (1, 2, 3) people have edited my answers and removed the indentation that I had left in quotes from OP's code and in suggested replacements. One went so far as to say "fixed indentation" in the change description. I can't find any discussion in meta which deals with the subject of indentation in answers, and I find it irritating that people should consider it broken when I go to extra effort to preserve the indentation from OP's code for ease of direct comparison and copy-paste replacement.
Is there some unwritten rule that answers should minimise indentation?