`revsets.md`: Add a sentence to clarify `connected`
@@ -84,7 +84,7 @@ revsets (expressions) as arguments.
* `children(x)`: Same as `x+`.
* `ancestors(x)`: Same as `:x`.
* `descendants(x)`: Same as `x:`.
-* `connected(x)`: Same as `x:x`.
+* `connected(x)`: Same as `x:x`. Useful when `x` includes several commits.
* `all()`: All visible commits in the repo.
* `none()`: No commits. This function is rarely useful; it is provided for
completeness.
