For graph or cluster attributes, the substring "\G" is replaced by the
name of the graph or cluster.
For edge attributes, the substring "\E" is replaced by the name of the edge,
- and the substrings "\T" and "\H" by the names of the tail and head nodes,
- respectively. The name of an edge is the string formed
- from the name of the
+ the substring "\G" is replaced by the name of the graph or cluster,
+ and the substrings "\T" and "\H" by the names of
+ the tail and head nodes, respectively.
+ The name of an edge is the string formed from the name of the
tail node, the appropriate edge operator ("--" or "->") and the name of the
head node.
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