code.leo is an xml-format file that holds the I2P SAM server and

client sources in a dissected XML form.

If you're working on I2P SAM, we strongly encourage you to install
the Leo editor (http://leo.sf.net), and use it to edit the
sources. Otherwise, we're stuck with the menial task of re-importing
your changes into the Leo tree. Thanks for your understanding and
co-operation.