Update README.md to account for PHPCS line length limit.

Closes #3373753

README.md

 ## Introduction
 
-Introduces a button (render element) to allow visitors to print part of the current page.
-The printed page would use the same theme but without any of the regions, blocks, or other parts of the page that are
-not desired on the printed page.
+Introduces a button (render element) to allow visitors to print part of the
+current page. The printed page would use the same theme but without any of the
+regions, blocks, or other parts of the page that are not desired on the printed
+page.
 
 
 ## Requirements
@@ -12,12 +13,14 @@ This module requires no modules outside of Drupal core.
 
 ## Installation
 
-Install with composer: `composer require drupal/partial_page_print` then enable the module.
+Install with composer: `composer require drupal/partial_page_print` then enable
+the module.
 
 ## Using
 
-To add the print button to a page add the following element to the render array in your custom module or with a
-preprocess hook in your theme. Be sure that the `#element_id` is populated with the HTML ID of the think you want to be
+To add the print button to a page add the following element to the render array
+in your custom module or with a preprocess hook in your theme. Be sure that
+the `#element_id` is populated with the HTML ID of the thing you want to be
 printed on the page.
 
 ```php
@@ -29,7 +32,8 @@ printed on the page.
 ```
 
 ### Example
-Example of adding the partial page print button to a node template in your sites theme:
+Example of adding the partial page print button to a node template in your
+site's theme:
 
 **In your theme's .theme file:**
 ```php