Say you have a directory checked out at r1000, and you know that in r1100 a file
was added. You should be able to run "svn up filename" to get the file into
your working directory, but you can't, because svn refuses to target a
nonexistent wc path.
More generally, if an svn operation targets a wcpath which does not exist in the
wc, but the parent directory does exist, we should perform the operation with
the parent directory as anchor. So, for instance, "svn diff -rHEAD foo" in the
above example should display a diff of empty against <parent dir at HEAD>/foo.
Improvement
Critical