'svn diff --summarize' accepts but doesn't honour the '--ignore-properties' or
'--properties-only' flags.
It should honour them: that would be useful and logical.
In the meantime, until it does, it should error out.
Email thread: "svn diff --summarize with --ignore-properties or
--properties-only" started on 2015-02-14, archived at e.g.
http://mail-archives.apache.org/mod_mbox/subversion-dev/201502.mbox/%3C1423917673.7878.YahooMailNeo@web87703.mail.ir2.yahoo.com%3E
and http://svn.haxx.se/dev/archive-2015-02/0238.shtml
Bug
Major