With optional argument APPEND, append thumbnail to thumbnail buffer
instead of erasing it first.
-Option argument DO-NOT-POP controls if `pop-to-buffer' should be
+Optional argument DO-NOT-POP controls if `pop-to-buffer' should be
used or not. If non-nil, use `display-buffer' instead of
`pop-to-buffer'. This is used from functions like
`image-dired-next-line-and-display' and
(defun image-dired-read-comment (&optional file)
"Read comment for an image.
-Read comment for an image, optionally using old comment from FILE
-as initial value."
+Optionally use old comment from FILE as initial value."
(let ((comment
(read-string
"Comment: "