[Wilfred]

Difftastic is only ignoring whitespace that isn't significant. If you remove `if (true)`, it will get highlighted.

With a textual diff today, your only choices are 'highlight all whitespace changes' (e.g the git default) or 'ignore all whitespace' (e.g. diff --word-diff).

If difftastic says there are no changes, then both files have the same parse tree and the same comments.