Fix the following warning:

WARNING: Definition list ends without a blank line;
unexpected unindent.

By switching to the literal block syntax.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Link: https://lore.kernel.org/r/20200718165107.625847-8-dwlsalmeida@gmail.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>