Use proper output format [ci skip] (#27498)

actionpack/lib/action_dispatch/http/request.rb

@@ -87,7 +87,7 @@ module ActionDispatch
 
     # Returns true if the request has a header matching the given key parameter.
     #
-    #    request.key? :ip_spoofing_check #=> true
+    #    request.key? :ip_spoofing_check # => true
     def key?(key)
       has_header? key
     end

guides/source/active_record_postgresql.md

@@ -111,7 +111,7 @@ profile.settings = {"color" => "yellow", "resolution" => "1280x1024"}
 profile.save!
 
 Profile.where("settings->'color' = ?", "yellow")
-#=> #<ActiveRecord::Relation [#<Profile id: 1, settings: {"color"=>"yellow", "resolution"=>"1280x1024"}>]>
+# => #<ActiveRecord::Relation [#<Profile id: 1, settings: {"color"=>"yellow", "resolution"=>"1280x1024"}>]>
 ```
 
 ### JSON