return value of pathway-components

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Thanks for all your help on pathway-tools.

I ran into a discrepancy in the documentation for the call to pathway-components. I'm seeing 4 values returned: a list of reactions, then 3 integers. The documentation says that the return value is a list and 2 integers. The first and last integers look like the number of connected components and the total number of reactions (as described in the docs). But what is the second integer?

For example, for PWY-6341 in MetaCyc, the integers are 2,4,8.