Change made following content team edit

When the answer:
depends on too many things, for example the age of your child and the type of job can't be summed up
is not a popular search
make it part of a longer guide
This should be rephrased so the lead-in captures the whole point, ie “Make the answer part of a longer guide when:”
Merge pull request #80 from BenClancy/patch-4

Change made following content team edit