I came across this odd question on stackoverflow:
http://stackoverflow.com/q/13092854/1507392
If git diff is run with "..." as a separate argument between two
commit-ish arguments causes it to produce strange output. The
differences seem to be the same as if "..." was left out, but change
lines begin with 4 + or - characters rather than just 1.
Can anybody explain what is happening here? I don't have any reason to
want to use that form myself, but I'm very curious about why it produces
this odd output.
Thanks.
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