That definitely looks like a bug, but not one that anyone will be eager
to fix. It's very old code that tried to be clever, and that's the
hardest kind of code to fix.
Remember Kernighan's Law: "Everyone knows that debugging is twice as
hard as writing a program in the first place. So if you
Is the following a bug in your opinion? I think so.
This works as expected:
```
with(mtcars, plot(wt, mpg, plot.first = {
plot.window(range(wt), range(mpg))
arrows(3, 15, 4, 30)
}))
```
This does not.
```
plot(mpg ~ wt, data = mtcars, plot.first = {
plot.window(range(wt), range(mpg)
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