These tests have been added after the /graph changes and therefore
already test the new syntax.
This commit has to be reverted together with the previous one to get
back to the old new state. *sigh*
The chunk encoding was hardcoded there because it mostly doesn't
matter what encoding is chosen in that test. Since type 1 is
battle-hardened enough, I'm switching to type 2 here so that we can
catch unexpected problems as a byproduct. My expectation is that the
chunk encoding doesn't matter anyway, as said, but then "unexpected
problems" contains the word "unexpected".