- (let* ((prefix-end-idx (string-match "[^ \t*]" text-line))
- (fill-prefix (if prefix-end-idx
- (let ((raw-prefix (substring text-line 0 prefix-end-idx)))
- (replace-regexp-in-string "\*" " " raw-prefix))
- nil)))
+ (let* ((prefix-end-idx (string-match "^[ \t]*\\(\*+[ \t]\\)?" text-line))
+ (fill-prefix (replace-regexp-in-string "\*" " " (match-string 0 text-line))))