Each time you visit a file, Emacs automatically scans its contents
to detect what character encoding and end-of-line convention it uses,
-and converts these to Emacs' internal encoding and end-of-line
+and converts these to Emacs's internal encoding and end-of-line
convention within the buffer. When you save the buffer, Emacs
performs the inverse conversion, writing the file to disk with its
original encoding and end-of-line convention. @xref{Coding Systems}.