/etc/emacs/site-start.d/50psvn.el is in subversion-tools 1.9.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ; Set up autoloads for psvn (svn directory edit mode for emacs)
(autoload 'svn-status "psvn" nil t)
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