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.

local
  $(SML_LIB)/basis/basis.mlb
  $(SML_LIB)/smlnj-lib/Util/smlnj-lib.mlb
  $(SML_LIB)/mlyacc-lib/mlyacc-lib.mlb
  $(SML_LIB)/smlnj-lib/PP/pp-lib.mlb
in