Fix XML indentation in Emacs mode The return value of MATCH-STRING is a string. At least on Emacs 25, the comparisons between string and character with EQUAL could never succeed, and so the cases for matching braces were never triggered. GET-TEXT-PROPERTY may return a list rather than an atom (for example, on long lines with whitespace-mode turned on), and this broke the heuristic of looking for the tag face in previous text.

fun more n =
    if n <= 0 then
        "!"
    else
        more (n-1) ^ more (n-1)

fun main n =
    debug "Let's give this a try....";
    return <xml>{[more n]}</xml>