[Documentation] The abstract grammar is missing a rule for edgeop

Ported Issue from Mantis Original ID: 2556 Reported By: pdragon

SEVERITY: MINOR Submitted: 2015-07-02 18:32:46

OS: ALL

OS BUILD: ALL

PLATFORM: TEXT

DESCRIPTION

On the page http://www.graphviz.org/content/dot-language if you follow through the abstract grammar trying to find '--' and '-->', you won't find them, because the definition for 'edgeop' is missing.

It should probably look like:

edgeop : ('--' | '->')