[ Chris Lamb ]
* Don't fail if comparing a nonexistent file with a .pyc file (and add test).
  (Closes: #1004312)
* Drop a reference in the manual page which claims the ability to compare
  non-existent files on the command-line. This has not been possible since
  version 32 which was released in September 2015. (Closes: #1004182)
* Add experimental support for incremental output support with a timeout.
  Passing, for example, --timeout=60 will mean that diffoscope will not
  recurse into any sub-archives after 60 seconds total execution time has
  elapsed and mark the diff as being incomplete. (Note that this is not a
  fixed/strict timeout due to implementation issues.)
  (Closes: reproducible-builds/diffoscope#301)
* Don't return with an exit code of 0 if we encounter device file such as
  /dev/stdin with human-readable metadata that matches literal, non-device,
  file contents. (Closes: #1004198)
* Correct a "recompile" typo.

[ Sergei Trofimovich ]
* Fix/update whitespace for Black 21.12.