Fix small typo on ifexists documentation
@@ -23,7 +23,7 @@ filtered, and "right" refers to the file supplying the matching records.
| | | left.node2 == right.node2 |
| node | node | left.id == right.id |
| edge | node | left.node1 == right.id |
-| node | edge | right.id == left.node1 |
+| node | edge | left.id == right.node1 |
## Usage
