test: Update expected error messages

Author: KSXGitHub

tests/cli_errors.rs

@@ -69,7 +69,7 @@ fn min_ratio_1() {
         text_block! {
             "error: Invalid value \"1\" for '--min-ratio <MIN_RATIO>': greater than or equal to 1"
             ""
-            "For more information try --help"
+            "For more information try '--help'"
         }
     );
     assert_eq!(&stdout, &[] as &[u8]);
@@ -98,7 +98,7 @@ fn max_depth_0() {
         text_block! {
             "error: Invalid value \"0\" for '--max-depth <MAX_DEPTH>': number would be zero for non-zero type"
             ""
-            "For more information try --help"
+            "For more information try '--help'"
         }
     );
     assert_eq!(&stdout, &[] as &[u8]);