Strange behaviour when adding a string with ":" as node identifier while creating a new edge

[LucaGebhardt2206]

diagram = Digraph()
diagram.node(account["id"], browser["id"])
Creates a new node with the desired identifier: 01.08.2017-00:00:00

diagram = Digraph()
diagram.edge(account["id"], browser["id"])
Unfortunately, it cuts of the identifier at the first ':': 01.08.2017-00

As a result, two different nodes are created.

I found in lang.py at line 81 that ":" is used as a static identifier.
Probably, a variable identifier with ":" as default parameter would be an appropriate solution.

The debugger indicates that the string is assembled incorrectly: '01.08.2017-00":00:00"'

[xflr6]

Thanks, AFAIU this is a duplicate of #53 (current workaround would be to not use node names with literal colons).