Shell Programming and Scripting

123, abc , bbccdd
     cde
     efg
124, acd, abcdee

123, abc cde efg, bbccdd
124, acd, abcdee

awk 'BEGIN{FS=OFS=","}function pr(){for(i=1;i<=n;i++)printf a[i] (i<n?OFS:ORS)}NF==3{if(a[1])pr();n=split($0,a);next}{a[2]=a[2] $0}END{pr()}' file1 > file2

echo '123, abc , bbccdd
        cde
        efg
124, acd, abcdee' |awk '/ ,/{l=split($0,a,","); for(i=1;i<=l;i++) if(a[i]~/ $/) {x=i}}NF==1{a[x]=a[x]" "$1}! / ,/&&NF>1{for(i=1;i<l;i++) printf a[i] ","FS;print a[l];print $0;delete a}'
123,  abc  cde efg,  bbccdd
124, acd, abcdee