ability to consider final Return Value

ability to consider final Return Value

for a given section/subpage.  So, given the churn in output from 3rd party tests
from the "Installing Evergreen pre-requisites" section, we'll be more lenient
and just consider the final return value from the Makefile there.  We'll still
style errors in Red in the section output itself.

Signed-off-by: Jason Etheridge <jason@esilibrary.com>