Course-content-and-status.md

@@ -79,7 +79,8 @@ TODO. Consider adding some sub-title to divide the content into smaller chunks.
 
 ## Imaging contrast
 
-## Key concepts. TODO. As earlier. TODO. Check titles.
+## Key concepts. 
+TODO. As earlier. TODO. Check titles.
 
 ## Image modalities. 
 * Video. Imaging contrast