rustfmt did not remove the empty line between function call arguments

[srinivasreddy]

                                self.impl_or_trait_item(
-                                    self.tcx.impl_trait_ref(impl_did).unwrap().def_id,
-
-                                    item_name
-                                )
-                            }).unwrap();
-                        let note_span = self.tcx.map.span_if_local(item.def_id()).or_else(|| {
-                            self.tcx.map.span_if_local(impl_did)
-                        });
+                                self.impl_or_trait_item(self.tcx
+                                                            .impl_trait_ref(impl_did)
+                                                            .unwrap()
+                                                            .def_id,
+
+                                                        item_name)
+                            })
+                            .unwrap();
+                        let note_span = self.tcx
+                            .map
+                            .span_if_local(item.def_id())
+                            .or_else(|| self.tcx.map.span_if_local(impl_did));

see the item_name param.

https://github.com/rust-lang/rust/pull/36736/files/1d1168ccea6ee1ede476cefb424c384ba7904bb5#diff-45ff4c3ed02cc75f5b8162af5d9c782bL98

[nrc]

I think this is indicative of a wider policy where we don't remove excess newlines in case they are signalling something. However, I think we should only do this between statements, not within an expression.