Convenient when checking invisibility of text with no buffer position
(e.g. in before/after-strings).
-*** Non-breaking space is now displayed as whitespace.
-
*** `clear-image-cache' can be told to flush only images of a specific file.
*** `vertical-motion' can now be given a goal column.
says to stop, where possible, at a pixel x-position equal to COLS
times the default column width.
+** The Lisp interpreter now treats non-breaking space as whitespace.
+
** Miscellaneous new functions
*** `format-seconds' converts a number of seconds into a readable