Fix further compile errors.

src/nodes/dummy.rs

@@ -45,16 +45,14 @@ impl Optical for Dummy {
             } else {
                 Ok(HashMap::from([("rear".into(), None)]))
             }
+        } else if let Some(data) = incoming_data.get("rear") {
+            Ok(HashMap::from([("front".into(), data.clone())]))
         } else {
-            if let Some(data) = incoming_data.get("rear") {
-                Ok(HashMap::from([("front".into(), data.clone())]))
-            } else {
-                Ok(HashMap::from([("front".into(), None)]))
-            }
+            Ok(HashMap::from([("front".into(), None)]))
         }
     }
     fn set_inverted(&mut self, inverted: bool) {
-        self.is_inverted=true;
+        self.is_inverted = inverted;
     }
 }
 

src/optic_node.rs

@@ -26,7 +26,7 @@ impl OpticNode {
     /// use opossum::optic_node::OpticNode;
     /// use opossum::nodes::Dummy;
     ///
-    /// let node=OpticNode::new("My node", Dummy);
+    /// let node=OpticNode::new("My node", Dummy::default());
     /// ```
     pub fn new<T: OpticComponent + 'static>(name: &str, node_type: T) -> Self {
         let ports = node_type.ports();