Cleanup: move return statement to new line + trailing

Follow-up to #6497

src/Gui/PythonWrapper.cpp

@@ -261,7 +261,9 @@ public:
         }
 
         auto& pylist = wrappers[obj];
-        if (std::find_if(pylist.cbegin(), pylist.cend(), [pyobj](const Py::Object& py) { return py.ptr() == pyobj; }) == pylist.end()) {
+        if (std::find_if(pylist.cbegin(), pylist.cend(), [pyobj](const Py::Object& py) {
+            return py.ptr() == pyobj;
+        }) == pylist.end()) {
             pylist.emplace_back(pyobj);
         }
     }