THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
Step 0. create a JIRA issue here https://issues.apache.org/jira/browse/OODT (e.g., OODT-xxx where xxx is the issue ID)
Step 1. check out source code (e.g., svn co http://svn.apache.org/repos/asf/oodt/trunk/pushpull)
Step 2. edit files (e.g., src/main/bin/url-downloader)
Step 3. svn status (make sure it shows things have changed)
Step 4. svn diff > OODT-xxx.yourname.yyMMdd.txt (e.g., yyMMdd is the date)
Step 5. attach your patch file obtained from step #4 to issue at step #0