mention how to run bf in readme

README.md

@@ -25,5 +25,14 @@ Options:
   -V, --version  Print version
 ```
 
+For example running the
+[Game of Life](https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life)
+implemented in [brainfuck](https://en.wikipedia.org/wiki/Brainfuck) (read the
+source file to figure out how to use it):
+
+```
+RUST_LOG=info cargo run --release -- run -s ./lox/bf.lox -- bf/game_of_life.bf
+```
+
 Please note that some parts of the implementation have not been given enough
 thought.

src/resolver.rs

@@ -46,7 +46,7 @@ pub struct Resolver<'a> {
     interpreter: &'a mut Interpreter,
     /// Track the type of the current function being resolved (regular, method, initializer, ...).
     current_fun: FunctionType,
-    /// Tracks the type of the current class being resolved (regular, subclass, ...).
+    /// Track the type of the current class being resolved (regular, subclass, ...).
     current_class: ClassType,
 }