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 main () : transaction page =
    let
        val x = 1
        val y = "Hello"
        val z = 3.45
    in
        return <xml>{[x]}, {[y]}, {[z]}</xml>
    end