editors is indeed mostly if not exclusively about text editors, as the tag wiki indicates. I think I agree with renaming to text-editors — I can't think of many questions that could apply to a more general sense of “a program that modifies a file based on user interactions”.
editors should only be used on the few questions that are about editors in general, as opposed to about a specific editor. If you have a question about Emacs, tag it emacs. If you have a question about Serna, tag it serna.
Here are some examples of questions that should have the editors tag:
- Questions about choosing the right editor for a task.
- Questions about how (a large class of) editors work, such as What is a "modeless" vs a "modal" editor?What is a "modeless" vs a "modal" editor? or Get rid of *~ files in KDE editorsGet rid of *~ files in KDE editors or File permissions and savingFile permissions and saving
Questions about transforming text should use the tag text-processing, not text-editors, unless the question is specifically about doing the transformation interactively and not as part of a batch job.
There's a lot of cruft in the editors tag, due mainly to misuse with another editor tag. There should be very few, if any, questions tagged editors+emacs or editors+vim, etc.