Update 4-cli-components/0-overview.md

4-cli-components/0-overview.md

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 While it's possible to create an entire Vue.js application in a single JavaScript file, it will become unmanageable in all but the smallest of applications. To support breaking your application into smaller units, Vue allows you to create components. Components are reusable building blocks from which you can create your application.
 
-Components can be created as JavaScript files, or through a single-file component with a *.vue* extension. Single-file components use a _special syntax_ which cannot be read by a browser and must be converted into the appropriate JavaScript, HTML and CSS. The process of converting specialized syntax into something able to be read by a browser is known as _bundling_, and requires additional tooling such as webpack.
+Components can be created as JavaScript files, or through a single-file component with a *.vue* extension. Single-file components use a *special syntax* which cannot be read by a browser and must be converted into the appropriate JavaScript, HTML and CSS. The process of converting specialized syntax into something able to be read by a browser is known as *bundling*, and requires additional tooling such as webpack.
 
 Fortunately, Vue also provides a command line interface (CLI) which can be used to bootstrap an application. The CLI will configure all of the necessary tooling, including a bundler and development server.