replace all instances of "ends_with?" with "end_with?" (#15745)

The "ends_with?" method is just a Rails alias of Ruby's "end_with?" method.
Using the latter makes the code less brittle.

app/controllers/accounts_controller.rb

@@ -135,15 +135,15 @@ class AccountsController < ApplicationController
   end
 
   def media_requested?
-    request.path.split('.').first.ends_with?('/media') && !tag_requested?
+    request.path.split('.').first.end_with?('/media') && !tag_requested?
   end
 
   def replies_requested?
-    request.path.split('.').first.ends_with?('/with_replies') && !tag_requested?
+    request.path.split('.').first.end_with?('/with_replies') && !tag_requested?
   end
 
   def tag_requested?
-    request.path.split('.').first.ends_with?(Addressable::URI.parse("/tagged/#{params[:tag]}").normalize)
+    request.path.split('.').first.end_with?(Addressable::URI.parse("/tagged/#{params[:tag]}").normalize)
   end
 
   def cached_filtered_status_page

app/controllers/application_controller.rb

@@ -43,7 +43,7 @@ class ApplicationController < ActionController::Base
   private
 
   def https_enabled?
-    Rails.env.production? && !request.path.start_with?('/health') && !request.headers["Host"].ends_with?(".onion")
+    Rails.env.production? && !request.path.start_with?('/health') && !request.headers["Host"].end_with?(".onion")
   end
 
   def authorized_fetch_mode?

app/controllers/media_proxy_controller.rb

@@ -37,7 +37,7 @@ class MediaProxyController < ApplicationController
   end
 
   def version
-    if request.path.ends_with?('/small')
+    if request.path.end_with?('/small')
       :small
     else
       :original