For a successfully pushed ref, the summary shows the old and new
values of the ref in a form suitable for using as an argument to
`git log` (this is `<old>..<new>` in most cases, and
- `<old>...<new>` for forced non-fast-forward updates).
+ `<old>\...<new>` for forced non-fast-forward updates).
+
For a failed update, more details are given:
+