vimdiff − edit two, three or four versions of a file with
Vim and show differences

vimdiff [options] file1 file2 [file3 [file4]]


Vimdiff starts Vim on two (or three or four) files.  Each
file gets its own window.  The differences between the files
are highlighted.  This is a nice way to inspect changes and
to move changes from one version to another version of the
same file.

     See vim(1) for details about Vim itself.

     When started as gvimdiff the GUI will be started, if

     In each window the ’diff’ option will be set, which
causes the differences to be highlighted.
The ’wrap’ and ’scrollbind’ options are set to make the text
look good.
The ’foldmethod’ option is set to "diff", which puts ranges
of lines without changes in a fold.  ’foldcolumn’ is set to
two to make it easy to spot the folds and open or close

Vertical splits are used to align the lines, as if the "−O"
argument was used.  To use horizontal splits instead, use
the "−o" argument.

     For all other arguments see vim(1).


Most of Vim was made by Bram Moolenaar, with a lot of help
from others.  See ":help credits" in Vim.