[ Thanks to dave for
this link. ]
“vimdiff syntax
vimdiff [options] file1 file2 [file3]
gvimdiff“You may also use “gvimdiff” or “vim
-g”. The GUI is started then.You may also use
“viewdiff” or “gviewdiff”. Vim starts in
readonly mode then.”r” may be prepended for restricted
mode”