[range] Make iterator of 'indexed' adaptor default-constructible (refs #7827).

git-svn-id: http://svn.boost.org/svn/boost/trunk@84617 b8fc166d-592f-0410-95f2-cb63ce0dd405
lockfree: prevent warnings for unused arguments

Signed-off-by: Tim Blechmann <tim@klingt.org>

git-svn-id: http://svn.boost.org/svn/boost/trunk@84618 b8fc166d-592f-0410-95f2-cb63ce0dd405
[geometry] Comment purpose of spatial index benchmark2.cpp test

git-svn-id: http://svn.boost.org/svn/boost/trunk@84620 b8fc166d-592f-0410-95f2-cb63ce0dd405
coroutine: fix typo in Jamfile


git-svn-id: http://svn.boost.org/svn/boost/trunk@84622 b8fc166d-592f-0410-95f2-cb63ce0dd405