Fix syntax errors in compiler and clean up debug output

tests/test-function-call.c

@@ -0,0 +1,11 @@
+// test-function-call.c
+int add(int a, int b)
+{
+  return a + b;
+}
+
+int main(int argc, int argv)
+{
+  int result = add(5, 3);
+  return result;
+}