The variables in WiredTigerUtil::exportTableToBSON  – "subs" "key" "prefix" "suffix" – are generic and do not refer to the fields of the actual WT statistic table that the cursor is iterating over (and the header also does not give any explanation). To give readers context and generally make their lives easier, we should add comments and more descriptive variable names that explain what WiredTigerUtil::exportTableToBSON is doing.