Update modules/version-control/version_control_exercise.md

Co-authored-by: Jaro Camphuijsen <[email protected]>

modules/version-control/version_control_exercise.md

@@ -11,7 +11,7 @@ Discuss with your neighbor which of the following should be part of the code rep
 Discuss with your neighbor which of the following should be part of the code repository and why it should or should not.
 
 - installation instructions (i.e. detailed instructions on how to install the software)
-- user documentation
+- user documentation (i.e. information for the users of the software about its functionality and features)
 - full dataset to reproduce figures from a paper
 - a few data files to test the functionality of the code base
 - in-line comments intended only for code developers