the branch is fully merged to its upstream branch if it is not merged
to the current branch. It now deletes it in such a case.
- * "fiter-branch" command incorrectly said --prune-empty and --filter-commit
+ * "filter-branch" command incorrectly said --prune-empty and --filter-commit
were incompatible; the latter should be read as --commit-filter.
* When using "git status" or asking "git diff" to compare the work tree