Fixes typo: period in the middle of a sentence. Further clarifies the paragraph's meaning. (facebook#4448)

Author: mattrltrent

docs/linking.md

@@ -13,7 +13,7 @@ In addition to `https`, you're likely also familiar with the `mailto` scheme. Wh
 
 Like using the mailto scheme, it's possible to link to other applications by using custom url schemes. For example, when you get a **Magic Link** email from Slack, the **Launch Slack** button is an anchor tag with an href that looks something like: `slack://secret/magic-login/other-secret`. Like with Slack, you can tell the operating system that you want to handle a custom scheme. When the Slack app opens, it receives the URL that was used to open it. This is often referred to as deep linking. Read more about how to [get the deep link](#get-the-deep-link) into your app.
 
-Custom URL scheme isn't the only way to open your application on mobile. You don't want to use a custom URL scheme in links in the email because then the links would be broken on desktop. Instead, you want to use a regular `https` links such as `https://www.myapp.io/records/1234546`. and on mobile you want that link open your app. Android calls it **Deep Links** (Universal Links - iOS).
+A custom URL scheme isn't the only way to open your application on mobile. For example, if you want to email someone a link to be opened on mobile, using a custom URL scheme isn't ideal because the user might open the email on a desktop, where the link wouldn't work. Instead, you should use standard `https` links, such as `https://www.myapp.io/records/1234546`. On mobile, these links can be configured to open your app. On Android, this feature is called **Deep Links**, while on iOS, it is known as **Universal Links**.
 
 ### Built-in URL Schemes