The default wrapping for HTML files in Aquamacs (Options -> Line Wrapping) is set to Break Lines (AutoFill) at 70. I can change it, e.g. to Wrap, per buffer (file). But this doesn't change it for all HTML files that are to be open in the next session. Adopt as default changes it for the other open files, but still does not change it for HTML files that are to be open during next sessions.
This is for Aquamacs 2.4 on OS X Lion, if that makes any difference.
How to permanently change Line Wrapping (to Wrap) for all HTML files, so that I don't have to change it every time?