Fix trailing whitespace in NEWS.md.
Fix trailing whitespace in NEWS.md.

dbaarda/librsync,sourcefrog/librsync,librsync/librsync,sourcefrog/librsync,librsync/librsync,dbaarda/librsync,dbaarda/librsync,librsync/librsync,dbaarda/librsync,sourcefrog/librsync,sourcefrog/librsync,librsync/librsync