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.

functor F(M : sig
              table t : { A : int, B : int }
                PRIMARY KEY A
          end) = struct
    open M

    fun getByA a = oneRow1 (SELECT * FROM t WHERE t.A = {[a]})
end

table u : { A : int, B : int }
  PRIMARY KEY A,
  CONSTRAINT B UNIQUE B

open F(struct
           val t = u
       end)