Re: spaces in isearch

[Richard Stallman]

    Since C-q in isearch mode is processed by isearch-quote-char,
    it could intercept SPC and insert [ ] into the search string.

I thought about that, but it would not work right in all contexts.
For instance, suppose you're inside a [...] grouping already.

It's true that you don't *need* to use C-q if you're inside a [...]
grouping already.  But using it there shouldn't cause wrong results.