Shouldn't the extension be .dot?
edit: according to this[3] discussion , Microsoft uses .dot. I then found this wiki[4] page that supports the claim. dot is used by Microsoft Word document template files. I will switch to .gv
[1] https://en.wikipedia.org/wiki/Gzip
[2] https://en.wikipedia.org/wiki/DOT_(graph_description_languag...
[3] https://forum.graphviz.org/t/what-is-the-file-extension-for-...
[4] https://en.wikipedia.org/wiki/List_of_filename_extensions_(A... [4]
.doc = document, .dot = document template.