small refactor and cleanup

tests/call_syntax_parens.sl

@@ -0,0 +1,16 @@
+import ../stdlib/stdlib.sl
+import ../stdlib/io.sl
+import ../fn.sl
+
+: main
+    2 40 +
+    puti cr
+    extend-syntax
+    foo(1, 2)
+    puti cr
+    0
+;
+
+fn foo(int a, int b){
+    return a + b;
+}