🐛 Fix issues raised by clippy

build.rs

@@ -124,7 +124,7 @@ fn export_variables(tasks: Vec<Task>) {
             "#[allow(dead_code)]\nmod {} {{\n",
             task.module_name
         )) {
-            println!("{}", err);
+            println!("{err}");
             return;
         };
 
@@ -143,14 +143,14 @@ fn export_variables(tasks: Vec<Task>) {
         }
 
         for variable in variables {
-            if let Err(err) = dst_file.write_fmt(format_args!("    pub {}\n", variable)) {
-                println!("{}", err);
+            if let Err(err) = dst_file.write_fmt(format_args!("    pub {variable}\n")) {
+                println!("{err}");
                 break;
             }
         }
 
         if let Err(err) = dst_file.write(b"}\n") {
-            println!("{}", err);
+            println!("{err}");
         };
     }
 }