All kudos to Rob Harley,
All kudos to Rob Harley, sed stud, for fixing my sed regex, and then (because true wizards answer the underlying question, not just the one asked), showing that sed wasn’t even necessary. So, Rob got me from this:
| lynx -dump -force_html -stdin \
| sed -e 's/^\ \ \ \ \ /bigindent/' \
| sed -e 's/\ \+/\ /g' \
| sed -e 's/^\ /\ \ \ /g' \
| sed -e 's/^bigindent/\ \ \ \ \ /' \
| mutt $MAILLIST -s "${SUBJ_}"
To this:
| lynx -dump -force_html -stdin \
| sed -e 's/\([^ ]\) \+/\1 /g'
| mutt $MAILLIST -s "${SUBJ_}"
And finally to this:
| lynx -dump -force_html -stdin -justify=0 \
| mutt $MAILLIST -s "${SUBJ_}"
Thanks, Rob.