update README.org file.

README.org

@@ -298,10 +298,10 @@ data/light-meter-1
 48 directories, 1248 files
 #+end_src
 
-*The =/output= directory should now exist in the project's root directory -- with
-nothing in it.* This is where the charts will go, after running the Python (.py)
-scripts. The ~separator.sh~ script created it. The project's root directory should
-now look like the following,
+If you have run ~./seperator.sh~, the =/output= directory should now exist in
+the project's root directory -- with nothing in it. This is where the charts
+will go (or any other artefacts), after running the Python (.py) scripts. The
+project's root directory should now look like the following,
 
 #+begin_src shell :results code
   tree -L 1