Issue #1809352 follow-up by jthorson, nick_schuch: CHANGELOG.txt entry and small spelling fix.

core/CHANGELOG.txt

 
 Drupal 8.0, xxxx-xx-xx (development version)
 ----------------------
+- Added tour module. Provides highly contextual tips for UI elements.
 - Improved entity system.
     * Added support for saving and deleting entities through the controller.
     * Entities are now classed objects, implementing EntityInterface.

core/modules/views/views_ui/config/tour.tour.views-ui-en.yml

@@ -48,7 +48,7 @@ tips:
     id: views-ui-format-en
     plugin: text
     label: Output format
-    body: Use this section to manage the format of the output results. You can choose different ways in which the matching results are output. E.g. Choose <em>Content</em> to output each item completely, using your configured display settings. Other options include <em>Fields</em> which allows you to output only specific fields on each matching result. Additional formats can be added by installing additional module to <em>extend</em> Drupal's base functionality. 
+    body: Use this section to manage the format of the output results. You can choose different ways in which the matching results are output. E.g. Choose <em>Content</em> to output each item completely, using your configured display settings. Other options include <em>Fields</em> which allows you to output only specific fields on each matching result. Additional formats can be added by installing additional modules to <em>extend</em> Drupal's base functionality.
     weight: "4"
     attributes:
       data-class: views-ui-display-tab-bucket.format