v0.5.0

[v0.5.0] - 2025-09-29

New features

• diffedit3 now accepts files as arguments, not just dirs. So,
  diffedit3 left_file right_file output_file is now allowed. Mixing
  dirs and files is not allowed.

• When used on a single file, diffedit3 now permanently stays in "pinned" mode
  and the pinning/collapsing controls are disabled. Allowing the user to
  collapse the only editor doesn't make much sense.

Full Changelog: v0.4.0...v0.5.0