> This “| xargs” at the end seems redundant. xargs what? xargs is used to run a > command on each word of > the input..
It forces the words into one line: $ echo "zebra fox elephant elephant lion wolf fox " | xargs -n1 | sort -u | xargs elephant fox lion wolf zebra $echo "zebra fox elephant elephant lion wolf fox " | xargs -n1 | sort -u elephant fox lion wolf zebra
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