minor fix

yaahc · yaahc · commit 2719c1e6a3bd · 2019-06-12T12:29:37.000-07:00
diff --git a/src/driver.rs b/src/driver.rs
@@ -179,7 +179,7 @@ Available lint options:
     print_lints(&lints);
 
     let max_group_name_len = std::cmp::max(
-        "all".len(),
+        "clippy::all".len(),
         lint_groups
             .iter()
             .map(|group| group.len())
