DEFVAR_LISP ("script-representative-chars", &Vscript_representative_chars,
doc: /* Alist of scripts vs the representative characters.
-Each element is a cons (SCRIPT . CHARS), where SCRIPT is a script name symbol,
+Each element is a cons (SCRIPT . CHARS).
+SCRIPT is a symbol representing a script or a subgroupd of a script.
CHARS is a list or a vector of characters.
If it is a list, all characters in the list are necessary for supporting SCRIPT.
If it is a vector, one of the characters in the vector is necessary.