ldoc return fixes

inc/audio/audio.songs.lua

@@ -128,9 +128,10 @@ end
 --- @param beats.2 string Arrow direction ("left", "down", "up", or "right").
 --- @param bpm number Beats per minute.
 --- @param[opt] fps number Frames per second (default: 60).
---- @return result table The generated pattern, an array of arrow spawn entries.
---- @return result.frame number The frame number when the arrow should spawn.
---- @return result.dir string Arrow direction ("left", "down", "up", or "right").
+--- @return result table The generated pattern or nil. </br>
+--- Fields: </br>
+--- * frame (number) The frame number when the arrow should spawn.<br/>
+--- * dir (string) Arrow direction ("left", "down", "up", or "right").<br/>
 function beats_to_pattern(beats, bpm, fps)
   fps = fps or 60
   local pattern = {}