/* Caching facts about regions of the buffer, for optimization.
Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1995, 2001, 2002, 2003,
/* Caching facts about regions of the buffer, for optimization.
Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1995, 2001, 2002, 2003,