svnwrap: improve a docstring & a comment. The docstring for SubversionRepo was technically inaccurate; not only do we require Subversion 1.5, but the reference to a required parameter is inaccurate, as the parameter has a default value. (To be fair, relying on the default value is unlikely to work...) Part of a comment in SubversionRepo.revisions() was redundant, and could be removed. No functionality change.

#!/bin/sh
mkdir temp || exit 1
cd temp
svnadmin create repo
svn co file://`pwd`/repo wc
pushd wc
mkdir -p project/trunk
svn add project
svn ci -m 'trunk'
cd project/trunk
echo a > a
mkdir narf
svn add a narf
svn ci -m 'file and empty dir'
popd
svnadmin dump repo > ../empty_dir_in_trunk_not_repo_root.svndump
echo 'dump in empty_dir_in_trunk_not_repo_root.svndump'
echo 'you can probably delete temp now'