Unexpected behavior in graphvizit REPL when deleting arguments

[Dana Miller]

Thank you for all your work on this tool!

Here's a behavior in the REPL @caseywatts and I encountered while testing a tutorial that uses graphvizit - the fact that the effect of formatting arguments can appear to persist after they are deleted is especially confusing for new users:

• When a line is created, it is solid by default

digraph {
  "App B" -> "Postgres Instance" [color=red]
}

• The level of the value can be changed to explicitly set the line as dashed

digraph {
    "App B" -> "Postgres Instance" [color=red, style=dashed]
} 

• If you delete the style argument entirely, the line stays dashed

digraph {
    "App B" -> "Postgres Instance" [color=red]  
)

• There are ways around this, eg 1) reload the graphvizit page or 2) explicitly reset the style with style=solid , though it's still probably not the behavior (reverting to default) many users would expect.