(defun ses-read-printer (prompt default)
"Common code for `ses-read-cell-printer', `ses-read-column-printer', and `ses-read-default-printer'.
-PROMPT should end with \": \". Result is t if operation was cancelled."
+PROMPT should end with \": \". Result is t if operation was canceled."
(barf-if-buffer-read-only)
(if (eq default t)
(setq default "")