This little awk snippet wraps textlines longer than 80 characters and prepends a single blank to the wrapped content.
awk '{textlength=int(length($0)/70) ; i=1 ; \ if (length($0)>72) { \ { print substr($0,0,70) } \ while (i< =textlength) { { print " " substr($0,i*70+1,70) } i=i+1} \ } else { \ { print ($0) } } }' inputfile > outputfile
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