One-line Graphviz files not parsed

[oxy86]

GraphViz (dot) files can't be parsed if the data is in a single line.

For instance this graph is read but nothing is displayed:
digraph mydot { node [color=red, shape=box]; a -> b -> c ->d node [color=pink, shape=circle]; d->e->a->f->j->k->l->o [weight=1, color=black]; }

If we use line breaks, then everything is OK. Test:

digraph mydot {
node [color=red, shape=box];
a -> b -> c ->d
node [color=pink, shape=circle];
d->e->a->f->j->k->l->o
[weight=1, color=black];
}