Add README

README.md

@@ -13,4 +13,10 @@ cd ..
 java -cp bin com.craftinginterpreters.lox.Lox
 
 jlox [script]
+```
+
+Or
+
+```
+java -cp bin com.craftinginterpreters.lox.Lox sample-code.lox
 ```

sample-code.lox

@@ -0,0 +1,3 @@
+/* This is a block comment
+It has a new line */
+abc==123

src/com/craftinginterpreters/lox/Scanner.java

@@ -95,8 +95,10 @@ class Scanner {
                 break;
             case '=':
                 addToken(match('=') ? EQUAL_EQUAL : EQUAL);
+                break;
             case '<':
                 addToken(match('=') ? LESS_EQUAL : LESS);
+                break;
             case '>':
                 addToken(match('=') ? GREATER_EQUAL : GREATER);
                 break;