GVPR vim syntax
Input programs to GVPR could be syntax highlighted if Vim had support for the format. Does a .vim file for the language exist already? If not, I would be open to working on such a thing. It would make sense to submit this to Vim itself rather than the Graphviz repo, as they're very accepting of new formats.
We could do this for other editors as well, but I'm just proposing this for Vim because it's my editor of choice and I'm tired of looking at unhighlighted text.