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# Two and three dots in difference specs

Imagine a series of commits A, B, C, D… Imagine that there are two branches, topic and main. You branched topic off main when main was at commit ‘E’. The graph of the commits looks like this:

         A---B---C topic
         /
    D---E---F---G main

Then:

    git diff main..topic

will output the difference from G to C (i.e. with effects of F and G), while:

    git diff main...topic

would output just differences in the topic branch (i.e. only A, B, and C).