Fix: Render option mono-spaced

doc/03-cli.md

@@ -177,7 +177,7 @@ php composer.phar require vendor/package:2.* vendor/package2:dev-master
 * **--no-update:** Disables the automatic update of the dependencies.
 * **--no-progress:** Removes the progress display that can mess with some
   terminals or scripts which don't handle backspace characters.
-* **--update-no-dev:** Run the dependency update with the --no-dev option.
+* **--update-no-dev:** Run the dependency update with the `--no-dev` option.
 * **--update-with-dependencies:** Also update dependencies of the newly
   required packages.
 * **--sort-packages:** Keep packages sorted in `composer.json`.