After seeing a conflict, you can do two things:
       •   Decide not to merge. The only clean-ups you need are to reset
           the index file to the HEAD commit to reverse 2. and to clean
           up working tree changes made by 2. and 3.; git merge --abort
           can be used for this.
       •   Resolve the conflicts. Git will mark the conflicts in the
           working tree. Edit the files into shape and git add them to
           the index. Use git commit or git merge --continue to seal the
           deal. The latter command checks whether there is a
           (interrupted) merge in progress before calling git commit.
       You can work through the conflict with a number of tools:
       •   Use a mergetool.  git mergetool to launch a graphical
           mergetool which will work you through the merge.
       •   Look at the diffs.  git diff will show a three-way diff,
           highlighting changes from both the HEAD and MERGE_HEAD
           versions.
       •   Look at the diffs from each branch.  git log --merge -p
           <path> will show diffs first for the HEAD version and then
           the MERGE_HEAD version.
       •   Look at the originals.  git show :1:filename shows the common
           ancestor, git show :2:filename shows the HEAD version, and
           git show :3:filename shows the MERGE_HEAD version.