Difftastic is a structural diff tool that understands syntax. See the manual to get started, and the changelog for historical changes.
Command Line Interface
Removed the option --missing-as-empty. This is no longer needed as difftastic handles /dev/null gracefully on all platforms.
Parsing
Added support for Ada.
.ino files are now treated as C++.
Improved parsing for TOML.
Updated grammars for Bash, C, C++, C#, Clojure, CMake, Elixir, Go, Java, JavaScript, OCaml, Perl, QML and TypeScript.
Difftastic now prefers treating files as 'mostly UTF-8' or binary rather than UTF-16. Many files can be decoded as UTF-16 without decoding errors but produce nonsense results, so this heuristic seems to work better.
Fixed an issue where difftastic would discard the last newline in a file before diffing. This was most noticeable when doing textual diffs and the last line had changed.
Display
Difftastic no longer uses purple to highlight regions that are missing styling. This was intended as a debug feature, but it in practice it only highlighted trailing whitespace for a few languages.