small english fix

src/detections/configs.rs

@@ -101,7 +101,7 @@ fn build_app<'a>() -> ArgMatches<'a> {
         .setting(AppSettings::VersionlessSubcommands)
         .arg(
             // TODO: When update claps to 3.x, these can write in usage texts...
-            Arg::from_usage("--level-tuning=[LEVEL_TUNING_FILE] 'Fix rule file's level'")
+            Arg::from_usage("--level-tuning=[LEVEL_TUNING_FILE] 'Adjust rule level.'")
                 .default_value("./config/level_tuning.txt"),
         )
         .usage(usages)

src/main.rs

@@ -85,6 +85,7 @@ impl App {
         // Show usage when no arguments.
         if std::env::args().len() == 1 {
             self.output_logo();
+            println!();
             println!("{}", configs::CONFIG.read().unwrap().args.usage());
             println!();
             return;