test: extend test_docs for collapsed info boxes

Author: xmatthias

tests/test_docs.sh

@@ -2,7 +2,8 @@
 # Test Documentation boxes -
 # !!! <TYPE>: is not allowed!
 # !!! <TYPE> "title" - Title needs to be quoted!
-grep -Er '^!{3}\s\S+:|^!{3}\s\S+\s[^"]' docs/*
+# Same for ???
+grep -Er '^(!{3}|\?{3})\s\S+:|^(!{3}|\?{3})\s\S+\s[^"]' docs/*
 
 if  [ $? -ne 0 ]; then
     echo "Docs test success."