Noam Postavsky <npostavs@gmail.com> writes:

> On 29 June 2018 at 10:52, John Shahid <jvshahid@gmail.com> wrote:
>
>>     (replace-regexp-in-string "\\(\n\n\\).*\\'"
>
> The trick is that "." matches anything but a newline, using (.\\|\n\\)
> instead works as expected:
>
> (replace-regexp-in-string "\\(\n\n\\)\\(?:.\\|\n\\)*\\'"
>               "\n\ndoc\\1"
>               "foo\n\nbar\n\nbaz"
>               nil
>               nil
>               1)

Thanks that worked. Totally missed that "." doesn't match newlines in
the documentation.

attached a new patch with the fix.