Merge pull request #107 from gwelymernans/master

Prefer splitting argument after list start if before a tuple.
Update help documentation
Reflow large lines by manipulating the tokens directly.

This algorithm takes the token stream and creates a higher abstraction
out of it. It then uses this abstraction to re-flow the tokens. This
gives us a finer-grained handling of the elements, allowing us to make
better decisions about what to place where. It actually generates two
candidate formattings and allows the current heuristic to pick the
"best" one from them.