fix code sample in `__utils__.findAll` documentation

this code doesn't work; `Array.prototype.forEach` should be `Array.prototype.map`.
Merge pull request #1073 from cvan/patch-1

fix code sample in `__utils__.findAll` documentation
Handle form elements in fetchText
Adding a test to check that text can be fetched from the value attribute
Merge pull request #1079 from andy-g/fetchText_handle_form_elements

refs #1078 - Handle form elements in fetchText (waitForSelectorTextChange)