error-string-func-concat-1.ck:17:9: error: cannot perform '+' on string and '[fun]Foo.getFoo()'
[17] <<< " " + f.getFoo >>>;
             ^
error-string-func-concat-1.ck:17:13: error: ...(hint: to call the function, add '()' and any arguments)
[17] <<< " " + f.getFoo >>>;
                 ^
