checks out the branch (instead of detaching). You may also specify
`-` which is synonymous with `"@\{-1\}"`.
+
-As a further special case, you may use `"A...B"` as a shortcut for the
+As a further special case, you may use `"A\...B"` as a shortcut for the
merge base of `A` and `B` if there is exactly one merge base. You can
leave out at most one of `A` and `B`, in which case it defaults to `HEAD`.