Fix bug

src/tokenizer.rs

@@ -68,7 +68,7 @@ pub fn tokenize(input: &str) -> Option<Vec<Token>> {
             RParen
         } else if c == ':' {
             Colon
-        else if  c == ',' {
+        } else if  c == ',' {
             Comma
         } else if c == '"' {
             let mut buffer = String::with_capacity(20);