DEV: Correctly tag heredocs (#16061)

This allows text editors to use correct syntax coloring for the heredoc sections.

Heredoc tag names we use:

languages: SQL, JS, RUBY, LUA, HTML, CSS, SCSS, SH, HBS, XML, YAML/YML, MF, ICS
other: MD, TEXT/TXT, RAW, EMAIL

app/controllers/posts_controller.rb

@@ -45,14 +45,14 @@ class PostsController < ApplicationController
       opts[:limit] = MARKDOWN_TOPIC_PAGE_SIZE
       topic_view = TopicView.new(params[:topic_id], current_user, opts)
       content = topic_view.posts.map do |p|
-        <<~HEREDOC
+        <<~MD
           #{p.user.username} | #{p.updated_at} | ##{p.post_number}
 
           #{p.raw}
 
           -------------------------
 
-        HEREDOC
+        MD
       end
       render plain: content.join
     end

app/controllers/session_controller.rb

@@ -247,7 +247,7 @@ class SessionController < ApplicationController
     rescue ActiveRecord::RecordInvalid => e
 
       if SiteSetting.verbose_discourse_connect_logging
-        Rails.logger.warn(<<~EOF)
+        Rails.logger.warn(<<~TEXT)
         Verbose SSO log: Record was invalid: #{e.record.class.name} #{e.record.id}
         #{e.record.errors.to_h}
 
@@ -256,7 +256,7 @@ class SessionController < ApplicationController
 
         SSO Diagnostics:
         #{sso.diagnostics}
-        EOF
+        TEXT
       end
 
       text = nil

app/jobs/base.rb

@@ -303,11 +303,11 @@ module Jobs
     # Simulate the args being dumped/parsed through JSON
     parsed_opts = JSON.parse(JSON.dump(opts))
     if opts != parsed_opts
-      Discourse.deprecate(<<~MSG.squish, since: "2.9", drop_from: "3.0")
+      Discourse.deprecate(<<~TEXT.squish, since: "2.9", drop_from: "3.0")
         #{klass.name} was enqueued with argument values which do not cleanly serialize to/from JSON.
         This means that the job will be run with slightly different values than the ones supplied to `enqueue`.
         Argument values should be strings, booleans, numbers, or nil (or arrays/hashes of those value types).
-      MSG
+      TEXT
     end
     opts = parsed_opts
 

app/serializers/reviewable_serializer.rb

@@ -59,7 +59,7 @@ class ReviewableSerializer < ApplicationSerializer
   def self.create_attribute(name, field)
     attribute(name)
 
-    class_eval <<~GETTER
+    class_eval <<~RUBY
       def #{name}
         #{field}
       end
@@ -67,7 +67,7 @@ class ReviewableSerializer < ApplicationSerializer
       def include_#{name}?
         #{name}.present?
       end
-    GETTER
+    RUBY
   end
 
   # This is easier than creating an AMS method for each attribute

app/services/user_action_manager.rb

@@ -11,7 +11,7 @@ class UserActionManager
   end
 
   [:notification, :post, :topic, :post_action].each do |type|
-    self.class_eval(<<~METHODS)
+    self.class_eval(<<~RUBY)
       def self.#{type}_created(*args)
         return if @disabled
         #{type}_rows(*args).each { |row| UserAction.log_action!(row) }
@@ -20,7 +20,7 @@ class UserActionManager
         return if @disabled
         #{type}_rows(*args).each { |row| UserAction.remove_action!(row) }
       end
-    METHODS
+    RUBY
   end
 
 private