Update documentation re: running prettier . --write

Author: gitKrystan

README.md

@@ -53,7 +53,9 @@ Prettier 3.0.0 and above
 
    _If you already have a `"prettier"` section in `package.json`, remember that takes precedence over the `.prettierrc.js` file!_
 
-1. Run `npm prettier --write .`
+1. Run `npm prettier --write . --plugin prettier-plugin-ember-template-tag`
+
+   See <https://github.com/gitKrystan/prettier-plugin-ember-template-tag/issues/113> and <https://github.com/prettier/prettier/issues/15351> for details on why using the `--plugin` flag is required here.
 
 ## Opinions
 

examples/bin/test.mjs

@@ -17,6 +17,7 @@ const newLine = () => console.log();
 const inputDir = './input';
 const expectedOutputDir = './expected-output';
 
+// NOTE: Run with `--debug` to get debug output (from both this script and prettier)
 const run = async () => {
   logDebug('Reading input directory...');