Fixed obscure EOF bug in lexer

scripts/valgrind.toy

@@ -1,26 +1,8 @@
 
 
-//increment & decrement (prefix)
-{
-	var a = 42;
-	assert a == 42;
-	assert ++a == 43;
-	assert a == 43;
-	assert --a == 42;
-	assert a == 42;
 
-	print a;
-}
+var answer = 42;
 
+var question: string = "How many roads must a man walk down?";
 
-//increment & decrement (postfix)
-{
-	var a = 42;
-	assert a == 42;
-	assert a++ == 42;
-	assert a == 43;
-	assert a-- == 43;
-	assert a == 42;
-
-	print a;
-}
+print question;

source/toy_lexer.c

@@ -242,7 +242,6 @@ static Toy_Token makeString(Toy_Lexer* lexer, char terminator) {
 	while (!isAtEnd(lexer)) {
 		//stop if you've hit the terminator
 		if (peek(lexer) == terminator) {
-			advance(lexer); //eat the terminator
 			break;
 		}
 
@@ -261,6 +260,8 @@ static Toy_Token makeString(Toy_Lexer* lexer, char terminator) {
 		return makeErrorToken(lexer, "Unterminated string");
 	}
 
+	advance(lexer); //eat the terminator
+
 	//make the token
 	Toy_Token token;