[dev] ssam rocks! unwrapping paragraphs

[201009-suckless]

sed is the canonical paragraph mangler. It's worth spending a bit to grok how 
that is true.

    tr -d '\r' | sed '/^$/!{H;d;};p;x;s/\n/ /g;'

Gutenberg lines are CRLF-terminated so `tr` is needed.