Add support for (topological) branches and merges in generate_repo.py
include an example input file (currently not used in actual tests).
Depends on !47 (closed).
Migrated from D5892 (view on Phabricator)
include an example input file (currently not used in actual tests).
Depends on !47 (closed).
Migrated from D5892 (view on Phabricator)