Add docstring for project_neighbors(). (#955)
Add docstring for project_neighbors(). (#955)

* Add docstring for project_neighbors().

* Replace "Common bug..." section

Co-authored-by: Branen Salmon <branen.salmon@kensho.com>

* Apply edits from code review.

Co-authored-by: Branen Salmon <branen.salmon@kensho.com>

Co-authored-by: Selene Chew <selene.chew@kensho.com>

Co-authored-by: Leon Wu <3bc7369d172994d18d6678669b70f47dc32ecde5@kensho.com>

kensho-technologies/graphql-compiler,kensho-technologies/graphql-compiler