quizzes/software-carpentry-pre-assessment: Allow multiple platforms

For mixed-OS environments (e.g. local OS X machine with department
Linux boxes).

diff --git a/quizzes/software-carpentry-pre-assessment.json b/quizzes/software-carpentry-pre-assessment.json
index 8d2a3dd86f2a76746e677725da6b9cc6e883f2fe..14341d007115380e57b8c6cdf409bbbd37c2e68a 100644 (file)
--- a/quizzes/software-carpentry-pre-assessment.json
+++ b/quizzes/software-carpentry-pre-assessment.json
@@ -47,6 +47,7 @@
                        "class": "ChoiceQuestion",
                        "prompt": "Platform",
                        "display_choices": true,
+                       "multiple_answers": true,
                        "accept_all": true,
                        "answer": [
                                "Linux",