Avoid warning from `geom_line()` bubbling up in `autoplot()`?

[hfrick]

Do we want to try to avoid that warning from geom_line()?

library(tidymodels)
library(censored)
#> Loading required package: survival
library(finetune)

set.seed(1)
sim_dat <- prodlim::SimSurv(500) %>%
  mutate(event_time = Surv(time, event)) %>%
  select(event_time, X1, X2)

sim_rs <- vfold_cv(sim_dat)

time_points <- c(10, 1, 5, 15)

mod_spec <-
  decision_tree(tree_depth = tune(), min_n = 4) %>%
  set_engine("partykit") %>%
  set_mode("censored regression")

sint_mtrc <- metric_set(brier_survival_integrated)

grid <- tibble(tree_depth = c(1, 2, 10))
rctrl <- control_race(save_pred = TRUE, verbose_elim = FALSE, verbose = FALSE)

set.seed(2193)
aov_integrated_res <-
  mod_spec %>%
  tune_race_anova(
    event_time ~ X1 + X2,
    resamples = sim_rs,
    grid = grid,
    metrics = sint_mtrc,
    eval_time = time_points,
    control = rctrl
  )

autoplot(aov_integrated_res, eval_time = 10) 
#> `geom_line()`: Each group consists of only one observation.
#> ℹ Do you need to adjust the group aesthetic?

^{Created on 2023-07-28 by the reprex package (v2.0.1)}

[topepo]

The code for this is in tune so I'll move it there.

[topepo]

The offending code is in tune:::plot_marginals()

[topepo]

Let's detect this and then error with an explanation.

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