Merge luaML.love

Manual_tests.md

@@ -9,9 +9,9 @@ Initializing settings:
     - `default_map` absent/present
     - when connecting to a new app
 
-  - run with an untested version. Error message pops up and waits for a key. The app attempts to continue, and doesn't receive the key.
+  - run with an untested version of LÖVE. Error message pops up and waits for a key. The app attempts to continue, and doesn't receive the key.
   - run with a LÖVE v12 release candidate. No errors; it is a supported version. All tests pass.
-  - create a couple of spuriously failing tests. Run with an untested version. Error message includes message about untested version.
+  - create a couple of spuriously failing tests. Run with an untested version of LÖVE. Error message includes message about untested version.
 
 Code loading:
 * run love with directory; text editor runs

main.lua

@@ -294,3 +294,8 @@ for handler_name in pairs(love.handlers) do
     end
   end
 end
+
+function warning_message()
+  assert(type(Current_app) == 'table')
+  return Current_app.message
+end