Remove single-line breaks only in document

Regarding copy/pasted text of copyright-free book from archive.org (link below), in attempt to expand single-line-break paragraph text (not section headings or paragraph breaks) to wider right margin, Justify or Wrap in LIbreOffice is not working, and Find/Replace the paragraph mark ($) wraps all the lines. I can't see a way to differentiate for just the single-break lines.So, please suggest a sed / awk command. Thanks.

Full text of "Hunting and Trapping on the Upper Magalloway River and Parmachenee Lake: First Winter in the ..."
pre.cjk { font-family: "Nimbus Mono L", monospace; }p { margin-bottom: 0.1in; line-height: 120%; }a:link { }

How far would

awk '$1=$1' RS= ORS="\n\n" file

get you?

1 Like

Thanks, gets me all the way! Have a great day.