bug#13805: query-replace-regexp has conflicting interactive defaults

[Juri Linkov]

>> From `emacs -Q':
>> M-% . RET ! RET ;; To put a replacement into the history.
>> M-b    ;; To place point before the word "buffer" in *scratch*.
>> C-M-%  ;; Prompts "Query replace regexp (default . -> !): ".
>> RET    ;; Prompts "Query replace regexp \_<buffer\.\_> with: ".
>> RET !  ;; Replaces "buffer" with "".
>
> The default logic was broken a week ago in revno:111803.
> This patch should restore the previous correct behavior:

This is fixed now, thanks for the bug report.