Corrected small mistake

Author: dschreij

QOpenScienceFramework/widgets/projecttree.py

@@ -695,7 +695,7 @@ def populate_tree(self, reply, parent=None, recursive=False):
                 parent.setChildIndicatorPolicy(
                     QtWidgets.QTreeWidgetItem.DontShowIndicatorWhenChildless)
             except RuntimeError:
-                warnings.warn('Node referenced after deletion:', e)
+                warnings.warn('Node referenced after deletion')
             except TypeError:
                 warnings.warn('Could not fetch node\'s status:', parent.text(0))