Improve clarity (#36022)

files/en-us/learn/server-side/first_steps/client-server_overview/index.md

@@ -52,7 +52,7 @@ This request includes:
 
 Web servers wait for client request messages, process them when they arrive, and reply to the web browser with an HTTP response message. The response contains an [HTTP Response status code](/en-US/docs/Web/HTTP/Status) indicating whether or not the request succeeded (e.g., {{HTTPStatus("200", "200 OK")}} for success, {{HTTPStatus("404", "404 Not Found")}} if the resource cannot be found, {{HTTPStatus("403", "403 Forbidden")}} if the user isn't authorized to see the resource, etc.). The body of the response to a successful `GET` request contains the requested resource.
 
-When an HTML page is returned it is rendered by the web browser. As part of processing, the browser may discover links to other resources (e.g. an HTML page usually references JavaScript and CSS files), and will send separate HTTP Requests to download these files.
+When an HTML page is returned, it is rendered by the web browser. As part of processing, the browser may discover links to other resources (e.g. an HTML page usually references JavaScript and CSS files), and will send separate HTTP Requests to download these files.
 
 Both static and dynamic websites (discussed in the following sections) use exactly the same communication protocol/patterns.