* When a string is created using `buffer-substring' or
`buffer-string', any duplicable extents in the region corresponding
to the string will be copied into the string (*note Buffer
- Contents::). When the string in inserted into a buffer using
+ Contents::). When the string is inserted into a buffer using
`insert', `insert-before-markers', `insert-buffer' or
`insert-buffer-substring', the extents in the string will be copied
back into the buffer (*note Insertion::). The extents in a string