bug#52558: Option for easier typing of regexps

[Juri Linkov]

>> Such option already exists, and it allows using custom regexp syntax
>> both for isearch and query-replace:
>
> Interesting, though its help mentions only isearch, so if I start
> M-x query-replace-regexp directly, it doesn't seem affected.

It affects all commands started from isearch: isearch-query-replace,
isearch-occur, isearch-highlight-regexp.