modeline: clean format and use truncate-string-to-width

* modeline.el (modeline-format-main): Using string-width to calculate
  the widths of strings is more accurate than my previous hand-made
  function.

  (modeline-length): This is no longer needed and now marked as
  obsolete.  It is not deleted entirely since per chance some other
  places are still using it.

  (modeline-format-minor-modes, modeline-format-buffer-name): Use
  truncate-string-to-width instead.

0 files changed, 0 insertions, 0 deletions