this when the branches to be merged have diverged wildly.
See also linkgit:git-diff[1] `--patience`.
+diff-algorithm=[patience|minimal|histogram|myers];;
+ Tells 'merge-recursive' to use a different diff algorithm, which
+ can help avoid mismerges that occur due to unimportant matching
+ lines (such as braces from distinct functions). See also
+ linkgit:git-diff[1] `--diff-algorithm`.
+
ignore-space-change;;
ignore-all-space;;
ignore-space-at-eol;;