Re: query-replace-interactive not documented

[Richard Stallman]

    Of course, most of these uses could be avoided if the replacement
    string of the ordinary query-replace-regexp would offer, say

    M-x query-replace-regexp RET
    \\footnote{ RET
    \\footnote{\\label{fn:\!replace-count} RET

    or

    \\footnote{\\label{fn:\!(format "%d" replace-count)} RET

    Namely \! followed by a sexp.

That seems like an interesting idea.