What is the etiquette for editing questions? How much is it OK to modify? What are the guidelines and what are the limits?
I am concerned that once a question has been edited, the difficulties facing the initial user may not be as conspicuous because the editor may have inadvertently filled in some critical conceptual gaps in the question.
Specifically:
Datasets are sometimes presented in different ways including jpeg screenshots. How should they be reformatted, in particular to avoid presuming R familiarity or preference? On this issue I got moderator guidance from @whuber advising to format them as text (usually comma delimited), or else include the data in the answer.
Should plots be always left untouched? Beyond subjective, aesthetic considerations, perhaps some subtle change in the presentation or the data may occur that defeats the purpose of the OP.
Do you all agree that improving the grammar to make the question understandable is an OK reason for an edit?
Is reformatting with $\LaTeX{}$ to beautify equations OK without exceptions?