I had to rewrite the SINK1-SINK7 definitions, since this new requirement
complained that we had to add this `MISSING: flow` annotation :D
Doing this implementation also revealed that there was a bug, since I
did not compare files when checking for these `MISSING:` annotations. So
fixed that up in the implementation for inline taint tests as well.
(extra whitespace in argumentPassing.py to avoid changing line numbers
for other tests)
should perhaps move `LocalFlowStepTest` and `MaximalFlowStep` into where
they are referenced (they did not seem too reusable after all).
Should also add argument tests in the same way.
