fixing TOC?

Author: cfiebach

lecture/_toc.yml

@@ -24,10 +24,12 @@ chapters:
       sections:
         - file: introduction/intro_python_IV.ipynb
 - file: experiments/experiments.md
-  sections: 
+  sections:
+    - file: experiments/experiments.md
+      sections: 
         - file: experiments/intro_psychopy_I.ipynb
-- file: experiments/data_analysis.md
-  sections: 
+    - file: experiments/data_analysis.md
+      sections: 
         - file: experiments/intro_psychopy_2_data_analysis.ipynb
 - file: showcases/showcases.md
   sections: