Where did library function svn_diff_hunk_readline_diff_text go?

[Paul Hammant]

Ben Reser had previously written a "svn-diff to JSON" thing in Python that
worked very well -
https://stackoverflow.com/questions/20381507/whats-the-best-way-to-turn-a-subversion-diff-into-json

I'm homebrew installing Subversion 1.10 and although there are Python
bindings (the --with-python flag no longer needed), they don't contain
the diff module or the svn_diff_hunk_readline_diff_text function.

Is there an additional homebrew or pip3 install for Python3 that I
should know about?

- Paul