Difftastic is a structural diff tool that understands syntax. See the manual to get started, and the changelog for historical changes.
Parsing
Updated Scala parser.
Improved parsing of qualified modules and variables in Haskell.
Diffing
Replaced strings now have subword highlighting, consistent with replaced comments. Thanks @amnore!
Fixed an issue with the cost model for comment replacement, leading difftastic to prefer modified comments even when exact comment matches are possible.
Simplified the cost model, which previously had an inconsistent heuristic depending on whether there were multiple items on the same line. This can lead to slightly different items being marked as changed, but on average the results are better.
Display
Improved word highlighting in comments when they contain numbers or hyphens.
Internals
Difftastic's logging is now configured with the environment variable DFT_LOG. This was previously RUST_LOG, which could interfere with users configuring logging for their own development work.