Adding a missing period in first error message.
@@ -10,7 +10,7 @@ while getopts ":n:" opt; do
n)
re='^[0-9]+$'
if ! [[ $OPTARG =~ $re ]] ; then
echo "Option -n requires a numeric argument"
echo "Option -n requires a numeric argument."
exit 1
fi
lines=$(($OPTARG - 1))
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