VDIFF == vimdiff Installable from melpa, vdiff enables
synchronized movement through diff buffers without resorting to
an extra control-panel as is the case with ediff. In addition
to speech-enabling interactive commands and setting up
face->voice mappings, this module provides commands that
speak the current hunk. These are bound in vdiff-mode-prefix-map.
emacspeak-vdiff-speak-this-hunk
bound to SPC.emacspeak-vdiff-speak-other-hunk bound to
C-SPC.emacspeak-vdiff-speak-other-line bound to
l.Speak corresponding hunk from other buffer.