Resolve URL encoding issue for pysvn that results in diffs not being displayable in the UI if the file's path contains a '#' (and possibly other special URL characters, such as '?')
The original code appeared to append the file path to the repo URL, then parse the result as a URL in order to URL-encode the file path. This is nonsensical, so most of the code has been removed and replaced with simply URL-encoding the path before appending it to the SVN repository URL.
Please see [here|https://groups.google.com/d/msg/reviewboard/GufvNZe9MUE/A4tAwtPMAwAJ] for more context on the issue.

Currently running in our production server. No known side-effects so far.