Remove duplicate lines, keeping only unique entries. Order is preserved based on first occurrence.
Example
apple, banana, apple, cherry → apple, banana, cherry
aaa, bbb, aaa, bbb → aaa, bbb
Remove duplicate lines, keeping only unique entries. Order is preserved based on first occurrence.
apple, banana, apple, cherry → apple, banana, cherry
aaa, bbb, aaa, bbb → aaa, bbb