flip.md
In ggstance: Horizontal 'ggplot2' Components

flipped geoms have correct `required_aes` failure messages

Code
  (expect_error(ggplot_build(p)))
Output
  <error/rlang_error>
  Error in `geom_linerangeh()`:
  ! Problem while setting up geom.
  i Error occurred in the 1st layer.
  Caused by error in `compute_geom_1()`:
  ! `geom_linerangeh()` requires the following missing aesthetics: y, xmin, and xmax

flipped stats have correct `required_aes` failure messages

Code
  (expect_error(ggplot_build(p), "y$"))
Output
  <error/rlang_error>
  Error in `stat_binh()`:
  ! Problem while computing stat.
  i Error occurred in the 1st layer.
  Caused by error in `compute_layer()`:
  ! `stat_binh()` requires the following missing aesthetics: y