Reduce string length.

git-svn-id: http://svn.boost.org/svn/boost/trunk@83929 b8fc166d-592f-0410-95f2-cb63ce0dd405
Tiny optimization of generator.convert-multiple-sources-to-consumable-types.

git-svn-id: http://svn.boost.org/svn/boost/trunk@83930 b8fc166d-592f-0410-95f2-cb63ce0dd405
Removed obsolete files.

git-svn-id: http://svn.boost.org/svn/boost/trunk@83931 b8fc166d-592f-0410-95f2-cb63ce0dd405