merge view demo
addon provides an interface for displaying and merging diffs,
The left (or center) pane is editable, and the differences with the
other pane(s) are optionally shown live as you edit
it. In the two-way configuration, there are also options to pad changed
sections to align them, and to collapse unchanged
stretches of text.
This addon depends on the google-diff-match-patch library to compute the diffs.