Format all the let chains in compiler

compiler/rustc_errors/src/emitter.rs

@@ -337,9 +337,7 @@ pub trait Emitter: Translate {
                     && last_name != name
                 {
                     let descr = macro_kind.descr();
-                    format!(
-                        " which comes from the expansion of the {descr} `{last_name}`",
-                    )
+                    format!(" which comes from the expansion of the {descr} `{last_name}`",)
                 } else {
                     "".to_string()
                 };
@@ -1935,7 +1933,9 @@ impl EmitterWriter {
                     is_multiline,
                 )
             }
-            if let DisplaySuggestion::Add = show_code_change && is_item_attribute {
+            if let DisplaySuggestion::Add = show_code_change
+                && is_item_attribute
+            {
                 // The suggestion adds an entire line of code, ending on a newline, so we'll also
                 // print the *following* line, to provide context of what we're advising people to
                 // do. Otherwise you would only see contextless code that can be confused for