* @const scaf_piece *mu@ = scaled approximation to @1/l@
* @size_t npiece@ = number of pieces in @l@
* @unsigned piecewd@ = nominal width of a piece in bits
- * @scaf_piece *scratch@ = @3*npiece + 1@ scratch pieces
+ * @scaf_piece *scratch@ = @3*npiece@ scratch pieces
*
* Returns: ---
*
/* This here is the hard part.
*
- * Let w = PIECEWD, let n = NPIECE, and let B = 2^w. Wwe must have
+ * Let w = PIECEWD, let n = NPIECE, and let B = 2^w. We must have
* B^(n-1) <= l < B^n.
*
* The argument MU contains pieces of the quantity ยต = floor(B^2n/l), which