test-repo/changelog_unreleased/cli/pr-9298.md

Fix: error on directories and files with numeric names (#9298 by @fisker)

$ cat 1/index.js
hello('world')

// Prettier stable
$ prettier 1
[error] The "path" argument must be of type string. Received type number (1)

// Prettier master
$ prettier 1
hello("world");