Labels with newlines break other tools

[ottobackwards]

Describe the bug dotifi dot files in other tools like http://magjac.com/graphviz-visual-editor/ break because of the newlines in the labels To Reproduce Do you have an example NIFI template that demonstrates the issue? Steps to reproduce the behavior: open the sample output dot file in http://magjac.com/graphviz-visual-editor/

Expected behavior http://magjac.com/graphviz-visual-editor/ shows the graph. This does work if newlines are removed

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS] VERSION:
• NIFI: [e.g. 1.12.0]
• Python: [e.g. 3.8]

Additional context Add any other context about the problem here.