When `start` is specified, `r_axis_inside` sometimes defaults to TRUE, despite it being a full circle

[davidhodge931]

Not sure if this is unintended behaviour, or a documentation issue...

library(palmerpenguins)
library(tidyverse)

penguins |>
  ggplot() +
  geom_point(
    aes(x = flipper_length_mm, 
        y = body_mass_g,
        col = species)) +
  theme_classic() +
  coord_radial(start = 90)
#> Warning: No appropriate placement found for `r_axis_inside`.
#> ℹ Axis will be placed at panel edge.
#> Warning: Removed 2 rows containing missing values or values outside the scale range
#> (`geom_point()`).

^{Created on 2024-03-06 with reprex v2.1.0}

[teunbrand]

This is a bug where c(90, 90 + 2 * pi) %% (2 * pi) gets normalised to have zero range.