Upgrade to rustfmt 0.8.3.

src/filetest/regalloc.rs

@@ -45,13 +45,16 @@ impl SubTest for TestRegalloc {
 
         comp_ctx.flowgraph();
         // TODO: Should we have an option to skip legalization?
-        comp_ctx.legalize(isa)
+        comp_ctx
+            .legalize(isa)
             .map_err(|e| pretty_error(&comp_ctx.func, e))?;
-        comp_ctx.regalloc(isa)
+        comp_ctx
+            .regalloc(isa)
             .map_err(|e| pretty_error(&comp_ctx.func, e))?;
 
         let mut text = String::new();
-        write_function(&mut text, &comp_ctx.func, Some(isa)).map_err(|e| e.to_string())?;
+        write_function(&mut text, &comp_ctx.func, Some(isa))
+            .map_err(|e| e.to_string())?;
         run_filecheck(&text, context)
     }
 }