* ediff-util.el (ediff-clone-buffer-for-region-comparison): change text
of message. Activate mark.
(ediff-activate-mark): set transient-mark-mode to t.
* ediff.el (ediff-regions-wordwise,ediff-regions-linewise): changed
docstrings.
* viper-keym.el (viper-insert-basic-map): deleted binding for S-TAB.