Fix source evaluation (for Org 9.6).

module2/exo2/exercice_R_en.org

 #+TITLE:  Your title
-#+AUTHOR: Your name
+#+AUTHOR: Thomas Rushton
 #+DATE:   Today's date
 #+LANGUAGE: en
 # #+PROPERTY: header-args :eval never-export
@@ -54,12 +54,12 @@ summary(cars)
 :  Max.   :25.0   Max.   :120.00
 
 Finally, an example for graphical output:
-#+begin_src R :results output graphics :file "./cars.png" :exports results :width 600 :height 400 :session *R* 
+#+begin_src R :file cars.png :results output graphics file :exports results :width 600 :height 400 :session *R*
 plot(cars)
 #+end_src
 
 #+RESULTS:
-[[file:./cars.png]]
+[[file:cars.png]]
 
 Note the parameter ~:exports results~, which indicates that the code
 will not appear in the exported document. We recommend that in the

module2/exo2/exercice_python_en.org

 #+TITLE:  Your title
-#+AUTHOR: Your name
+#+AUTHOR: Thomas Rushton
 #+DATE:   Today's date
 #+LANGUAGE: en
 # #+PROPERTY: header-args :eval never-export
@@ -60,7 +60,7 @@ print(x)
 #+end_example
 
 Finally, an example for graphical output:
-#+begin_src python :results output file :session :var matplot_lib_filename="./cosxsx.png" :exports results
+#+begin_src python :session :results output file :var matplot_lib_filename="./cosxsx.png" :exports results
 import matplotlib.pyplot as plt
 
 plt.figure(figsize=(10,5))