Collapse consecutive, dictionary nodes with only one, outgoing edge

[dylon]

The dictionary

![Expanded Graph](http://g.gravizo.com/g?
digraph ExpandedGraph {
size="4,4";
rankdir="LR";
root -> A;
node [style=filled,fillcolor=red];
A -> B;
B -> C;
C -> D;
D -> E;
node [style=rounded,fillcolor=white];
E -> F;
E -> G;
A -> H;
})

will become

![Collapsed Graph](http://g.gravizo.com/g?
digraph CollapsedGraph {
size="3,3";
rankdir="LR";
root -> A;
node [style=filled,fillcolor=red];
A -> BCDE;
node [style=rounded,fillcolor=white];
BCDE -> F;
BCDE -> G;
A -> H;
})

[dylon]

This change would require the use of cursors that kept track of which node they were in, along with the index of the current character in that node.