Make error messages during publishing more friendly.
* lisp/muse-mode.el (muse-index-as-string): Use with-temp-buffer instead
of muse-with-temp-buffer since we aren't inserting text from another
file.
* lisp/muse.el (muse-with-temp-buffer): Note in the documentation that
this is meant to be used with the insert-file-contents function, in
order to keep weird side effects from happening. Make the displayed
message more friendly when debug-on-error is nil, and suggest what to
do in order to get a full backtrace.
git-archimport-id: mwolson@gnu.org--2005/muse--rel--3.02--patch-37