diff --git a/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs b/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs
index 9930fa598bed2..09663085e969c 100644
--- a/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs
+++ b/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs
@@ -1183,7 +1183,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             } else {
                                 "".to_string()
                             };
-                            labels.push((span, format!("argument #{}{rendered} is missing", expected_idx.as_usize() + 1)));
+                            labels.push((
+                                span,
+                                format!(
+                                    "argument #{}{rendered} is missing",
+                                    expected_idx.as_usize() + 1
+                                ),
+                            ));
 
                             suggestion_text = match suggestion_text {
                                 SuggestionText::None => SuggestionText::Provide(false),