canonicalize svn paths even more awesomely It turns out that SVN has bizarre path canonicalization rules that are sort of close to what urllib.quote does, but different in peculiar ways, and 1.7 suddenly cares deeply about canonicality. For instance, space (' ') maps to %20, but '~' stays unchanged instead of turning into %7e. Along with its new policy of frequent beatings administered to users of its bindings, SVN 1.7 introduces a function that idempotently canonicalizes URIs, which I found sort of by accident, because that's how you learn about SVN API changes. Older versions of SVN are less anal, so urllib.quote continues to work fine for them.

#!/bin/sh
mkdir temp
cd temp
svnadmin create repo
svn co file://`pwd`/repo wc
cd wc
mkdir branches trunk tags
svn add *
svn ci -m 'btt'
cd trunk
mkdir narf
cd narf
for a in alpha beta gamma delta ; do
    echo $a > $a
done
cd ..
svn add narf
svn ci -m 'Add files.'
cd ../../..
svnadmin dump temp/repo > file_not_in_trunk_root.svndump
echo
echo 'Complete.'
echo 'You probably want to clean up temp now.'
echo 'Dump in file_not_in_trunk_root.svndump'
exit 0