MAINT: removed one redundant function call

src/caoscrawler/sync_graph.py

@@ -546,6 +546,8 @@ class SyncGraph:
           identifiable when none of the two nodes had the sufficient properties on its own before)
         - check whether dependent nodes can now get an identifiable (the merge might have set the
           ID such that dependent nodes can now create an identifiable)
+
+        Last review by Alexander Schlemmer on 2024-05-29.
         """
         # sanity checks
         if source is target:
@@ -617,8 +619,9 @@ class SyncGraph:
         # - merge
         self._add_identifiables_to_dependent_nodes(target)
 
-        if self.get_equivalent(target) is not None:
-            self._merge_into(target, self.get_equivalent(target))
+        eq_node = self.get_equivalent(target)
+        if eq_node is not None:
+            self._merge_into(target, eq_node)
 
     def _identifiable_is_needed(self, node: SyncNode):
         """