doxygen formatting fix: prevent stray examples appearing in the docs

The 'example' keyword triggers the creation of very out-of-context
example in the "Examples" top level of documentation. Rename the
keyword in the comment so the comment is still readable, but
does not trigger the doxygen.

Change-Id: Iecbdc236918f9178a034817aa6cea7ab6b2c1654
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
(cherry picked from commit 1705599efe5eec09c09d2214da776d92d0e4f1cf)