Work up example with this silly Python example

[abingham]

From twitter, it would be neat to show what CR can do with an example like this:

# In Python it's easy to show hilarious exceptions in code with 100% line 
# coverage that doesn't have 100% path coverage. See:

def f(x):
  if x > 0:
    result = "larger"
  elif x < 0:
    result = "smaller"
  return result

# Testing with x=1 and x=-1 gives 100% line coverage. https://t.co/aLSD9KrtSs