RE: grep-command: Ignore case if case-fold-search is non-nil

[Drew Adams]

> Do you think `grep-compute-defaults' should add '-i', i.e., ignore case,
> in the default `grep-command' when `case-fold-search' is non-nil?

No.

Just because you might want to search the current buffer
case-(in)sensitively, that in no way implies that you want to
search a set of files somewhere the same way.

`grep' is an external command.  It is not about acting (e.g.,
searching) buffers within Emacs.