cat old.md | npx textlint --stdin --stdin-filename "README.md" --fix --output-file new.md

It will not output the result of --fix. It will output formatter messsage.

If textlint support --formatter raw-output formatter, user can save the fixed result as output.

cat old.md | npx textlint --stdin --stdin-filename "README.md" --fix --formatter raw-output --output-file new.md

TODO

• add raw-output formatter to https://github.com/textlint/textlint/tree/master/packages/%40textlint/fixer-formatter
  • It just print message.output