Change compiler error message "Closure expression looks like it may be an isolated open block" to make it more clear

Running

{ println "foo" }

in the groovyConsole results in the compiler error message "Closure expression looks like it may be an isolated open block.;
solution: Add an explicit parameter list, as in

{it -> ...}, or label it as L:{...}.". For me as a groovy newbie it wasn't clear that the first solution marks the code as closure while the second marks it as block, I thought that both would result in a closure. Perhaps the wording should be changed to something like this:

"Expression could be either a closure expression or an isolated open block. Solution: Add an explicit parameter list, as in {it -> ...}

, to create a closure or label it as L:

{...}

to mark it as block."