Mostly restore the behaviour of file comparison and --exclude-directory-metadata
i.e. exclude metadata by default, when not comparing two directories. The reasoning is explained in the additional help text, and is implicitly why "compare_meta" was always defined in directory.py and why originally --no-exclude-directory-metadata did not apply to file comparison. (It now does, to fix #888402).
Showing with 24 additions and 15 deletions