See #32 - `accname` should return a **flat string** as defined [here](https://www.w3.org/TR/accname-1.1/#terminology). - `accname` should also format the output string such that it has no leading or trailing whitespace.
See #32
accnameshould return a flat string as defined here.accnameshould also format the output string such that it has no leading or trailing whitespace.