Doc: Fix grammar and typo

Author: GitauHarrison

file_upload_in_flask.md

@@ -496,7 +496,7 @@ To display the loaded files, we need to loop through all available content in th
         </div>
         <div class="col-sm-12 col-md-4 col-lg-2">
              <!-- empty -->
-        </div>        
+        </div>        20
     </div><hr>
 
     <!-- display content in uploads folder -->

localhost_testing.md

@@ -108,6 +108,6 @@ class Config:
         os.environ.get('WERKZEUG_RUN_MAIN') is not 'true'
 ```
 
-Now, when you run `flask run` command, you will notice that our tunnel is set up, and we can access our `ngrok` URL. We can alsoaccess the localhost URL.
+Now, when you run `flask run` command, you will notice that our tunnel is set up, and we can access our `ngrok` URL. We can also access the localhost URL.
 
 ![Create Tunnel on StartUp](images/create_tunnel_on_startup.png)