Fix doc typo.
Fixes #6355.

svn path=/trunk/libs/static_assert/; revision=80059
Removed missed usage of deprecated macros in Boost.StaticAssert

svn path=/trunk/boost/static_assert.hpp; revision=81588
Use variadic macros in static assert to make use easier.
Add warning suppression for GCC.
Minor doc fix.
Fixes #5810.
Fixes #7242.
Fixes #7966.

svn path=/trunk/boost/static_assert.hpp; revision=82886
Suppress GCC warnings.

svn path=/trunk/boost/static_assert.hpp; revision=83104