DEFUN ("define-fringe-bitmap", Fdefine_fringe_bitmap, Sdefine_fringe_bitmap,
2, 5, 0,
doc: /* Define fringe bitmap BITMAP from BITS of size HEIGHT x WIDTH.
-BITMAP is a symbol or string naming the new fringe bitmap.
+BITMAP is a symbol identifying the new fringe bitmap.
BITS is either a string or a vector of integers.
HEIGHT is height of bitmap. If HEIGHT is nil, use length of BITS.
WIDTH must be an integer between 1 and 16, or nil which defaults to 8.