lynx-dev chartrans question

[Leonid Pauzner]

docs/README.chartrans:
[...]
 - The "Raw" toggle (from -raw flag, '@' key, or Options screen)
   o  toggles the assumption "Default remote charset is same as Display
      Character Set" on or off.
      Toggling of the assumed charset is between Display Character Set and
      the specified ASSUME_CHARSET or, if they are the same, between the
      specified ASSUME_CHARSET and ISO-8859-1.
   o  The default for raw mode now depends on the Display Character Set as
      well as on the specified ASSUME_CHARSET value.
   o  should work as before for CJK charsets (turning CJK-mode on or off).
   o  If the effective ASSUME_CHARSET and the Display Character Set are
      unchanged from the ISO-8859-1 default, toggling "Raw" may have some
      additional effect for characters that can't be translated.
      ^^^^^^^^^^^^^^^^^???
   (Try the "Transparent" Display Character Set for more "rawness".)
[...]

What is the "additional effect" of toggling Raw mode
when both display charset and assume_charset are iso-8859-1 ?