SVN: How to undo a reverse-merge?

I merged my checkout of the HEAD revision back to revision 1000:

$ svn merge -rHEAD:1000 .
--- Reverse-merging r2000 through r1001 into '.':
U    dir/foo.txt

After that, I'd like to undo that and merge back to HEAD revision. My checkout should be at revision 1000 now, so I need to merge everything from 1000 to HEAD. But svn doesn't do anything:

$ svn mer开发者_如何转开发ge -r1000:HEAD .

Hmm, or just a revert?

$ svn revert .

It's just quiet and doesn't update foo.txt to the HEAD revision. How should I do it?

Do it recursivly,

svn revert -R .

Or revert only that changed file

svn revert dir/foo.txt