The documentation describes how we want this function to eventually behave,
once we have fixed a few problems with the current implementation.

This gives up proper dependency tracking of the test script.

Result lines that only contain the string "<BLANKLINE>" are treated as a blank
line.

Here "ghci>" was still used instead of ">>>".

"7.0.2" looked like a haddock version number before

Avoids indenting the title, and makes more sense since the title
is not a doc string anyway.

default-language should be Haskell2010, slight new semantics for extensions.
Rewrite into clearer dependencies of base and Cabal.

(It'd be better for Alex to generate this pragma.)