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.

type t = char

val isAlnum : t -> bool
val isAlpha : t -> bool
val isBlank : t -> bool
val isCntrl : t -> bool
val isDigit : t -> bool
val isGraph : t -> bool
val isLower : t -> bool
val isPrint : t -> bool
val isPunct : t -> bool
val isSpace : t -> bool
val isUpper : t -> bool
val isXdigit : t -> bool
val toLower : t -> t
val toUpper : t -> t

val toInt : t -> int
val fromInt : int -> t