add a TODO test case to expand function with arg of non-leaf exprs
add a TODO test case to expand function with arg of non-leaf exprs

See "expr instanceof LeafExpression" in src/optimizer.jsx

jsx/JSX,dj31416/JSX,jsx/JSX,dj31416/JSX,dj31416/JSX,jsx/JSX,dj31416/JSX,jsx/JSX,dj31416/JSX,jsx/JSX