(perl #128524) correct indentation for utf-8 key hash elements

(perl #128524) correct indentation for utf-8 key hash elements

For utf-8 flagged keys the indentation was left as the default, the
key length, and was not updated to the adjusted length after
escaping and quoting.

The test originally used a pre-rendered dump, but potentially other
minor changes to the output would break that, now it simply compares
against the output of the first case.