k-joseph@k-joseph-Notebook ~ $ sudo apt-get purge libsvn-java
[sudo] password for k-joseph:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libjna-java libsvn1 libemma-java libtrilead-ssh2-java libsvnkit-java
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  libsvn-java*
0 upgraded, 0 newly installed, 1 to remove and 467 not upgraded.
After this operation, 528 kB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 124965 files and directories currently installed.)
Removing libsvn-java ...
k-joseph@k-joseph-Notebook ~ $ sudo add-apt-repository ppa:dominik-stadler/subversion-1.7
You are about to add the following PPA to your system:
 Subversion 1.7
 Contains experimental packages for Subversion 1.7 and any required pre-requisites.

NOTE: These are not official builds, so don't expect this binaries to do anything useful, they are here in order to test packaging of Subversion 1.7

If you want to support development of these packages, please use the following link before purchasing on Amazon.de:
http://www.amazon.de/?ie=UTF8&site-redirect=de&_encoding=UTF8&site-redirect=de&tag=dsta-ppa-21&linkCode=ur2&camp=1638&creative=19454

Please use the following before purchasing on Amazon.com: http://www.amazon.com/?_encoding=UTF8&tag=dstadlerorg-20&linkCode=ur2&camp=1789&creative=390957
 More info: https://launchpad.net/~dominik-stadler/+archive/subversion-1.7
Press [ENTER] to continue or ctrl-c to cancel adding it

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 78, in run
    self.add_ppa_signing_key(self.ppa_path)
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 90, in add_ppa_signing_key
    print "Error reading %s: %s" % (lp_url, e)
NameError: global name 'lp_url' is not defined

k-joseph@k-joseph-Notebook ~ $