Changed format of TESTNAME

README.md

@@ -9,7 +9,7 @@ Lox is written in rust and requires `cargo` to test. [Install Rust](https://www.
 cargo test --release -- --nocapture TESTNAME
 ```
 
-Where TESTNAME is one of:
+Where `TESTNAME` is one of:
 
 ```
 stats_test_trust_levels