Remove word repetition

Author: notunderctrl

docs/src/pages/guide/start.md

@@ -18,7 +18,7 @@ npm i sveltefire firebase
 
 ### 2. Initialize
 
-Initialize Firebase and add add the `FirebaseApp` component to the component tree. Typically, this is done in the root `+layout.svelte` file to access Firebase in all pages. 
+Initialize Firebase and add the `FirebaseApp` component to the component tree. Typically, this is done in the root `+layout.svelte` file to access Firebase in all pages. 
 
 #### +layout.svelte
 ```svelte
@@ -84,4 +84,4 @@ Or you can use components to more easily pass data around. Notice how slot props
         <p>{post.content}</p>
     {/each}
 </Collection>
-```
+```