Add mention of same file input output to `cli.js`
Add mention of same file input output to `cli.js`

ulrikaugustsson/mdast,yukkurisinai/mdast,chcokr/mdast,eush77/remark,wooorm/remark,yukkurisinai/mdast,tanzania82/remarks,chcokr/mdast,ulrikaugustsson/mdast,eush77/remark