Fix trailing whitespace in UPGRADE.md

UPGRADE.md

@@ -7,14 +7,14 @@ General
 -------
 
 * Generally, this is a quite simple plugin with just one purpose.
-* It does not rely on any fluctuating library functions and should remain quite stable between Moodle major versions. 
+* It does not rely on any fluctuating library functions and should remain quite stable between Moodle major versions.
 * Thus, the upgrading effort is low.
 
 
 Upstream changes
 ----------------
 
-* This plugin does not inherit or copy anything from upstream sources. 
+* This plugin does not inherit or copy anything from upstream sources.
 * However, as it redirects especially to the auth_oauth2 auth plugin, you should have a look if anything important has changed within /auth/oauth2/login.php in Moodle core.
 
 
@@ -30,16 +30,16 @@ Manual tests
 ### Prerequisites:
 
 * Install the plugin to Moodle
-  
+
 ### Test OAuth backend
 
 * Login as admin
-  
+
 * Go to Site administration -> Server -> OAuth 2 services
 * Add a working OAuth 2 backend
 
 * Go to Site administration -> Plugins -> Authentication -> Direct SSO Entrypoint
-* In the "Allowed authentication plugins" setting, enable "OAuth 2" 
+* In the "Allowed authentication plugins" setting, enable "OAuth 2"
 * In the "Allowed wantspage targets" setting, enable "Dashboard"
 * Save the settings
 * Pick the usable URL for the SSO entrypoint
@@ -48,7 +48,7 @@ Manual tests
 * Make sure that you are logged in with the SSO provider, but not into Moodle
 * Go to the SSO entrypoint URL
 
-#### Expected result: 
+#### Expected result:
 
 * You are logged into Moodle
 * You are on the Moodle Dashboard
@@ -157,7 +157,7 @@ Manual tests
 * In the "Allowed authentication plugins" setting, enable "OAuth 2"
 * In the "Allowed wantspage targets" setting, enable "Course"
 * Save the settings
-* Pick the usable URL for the SSO entrypoint and replace the COURSEID placeholder with the ID of the course which you just created 
+* Pick the usable URL for the SSO entrypoint and replace the COURSEID placeholder with the ID of the course which you just created
 
 * Open a new private browser window
 * Make sure that you are logged in with the SSO provider, but not into Moodle