Sum reset not resetting

[apfranzen]

Hello,

Love the project. While looking at the homepage, I saw that sum could be reset with --:

Values are automatically accumulated in the sum variable.
It can be reset and set to zero by starting a line with double dash (--). 

In practice, it doesn't seem like sum is resetting like I would expect. Am I missing something or is this not working?

[bbodi]

Sorry, it seems the tutorial is out of date: you can reset sum using headers:

100
200
# Header
3
sum