improvement: use `wc` to count bp instead of summing contig header info for abundance about metagem HOT 1 OPEN

# Check if bins are original (megahit-assembled) or strict/permissive (metaspades-assembled)
            if [[ $bin == *.strict.fa ]] || [[ $bin == *.permissive.fa ]] || [[ $bin == *.s.fa ]] || [[ $bin == *.p.fa ]];then
                less $bin |grep ">"|cut -d '_' -f4|awk '{{sum+=$1}}END{{print sum}}' >> $(echo "$bin"|sed "s/.fa/.map/")
            elif [[ $bin == *.shovill.fa ]];then
                less $bin |grep ">"|cut -d ' ' -f2|sed 's/len=//g'|awk '{{sum+=$1}}END{{print sum}}' >> $(echo "$bin"|sed "s/.fa/.map/")
            elif [[ $bin == *megahit.fa ]];then
                less $bin |grep ">"|cut -d '-' -f4|sed 's/len=//g'|awk '{{sum+=$1}}END{{print sum}}' >> $(echo "$bin"|sed "s/.fa/.map/")
            else
                less $bin |grep ">"|cut -d '-' -f4|sed 's/len_//g'|awk '{{sum+=$1}}END{{print sum}}' >> $(echo "$bin"|sed "s/.fa/.map/")
            fi

genome.fa|grep -v '>'|tr -d '\n'|wc -m