Deleted Dieudonné plank or Dieudonné plank

The subspace $X$ of Dieudonné plank obtained by removing the point $\langle\omega_1,\omega\rangle$. So $X=(Y\times Z)\setminus\{\langle\omega_1,\omega\rangle\}$ where $Y=[0,\omega_1]$ is given the topology with points of $[0,\omega_1)$ isolated and neighborhoods of $\omega_1$ cocountable, and $Z=[0,\omega]$ is given the topology with points of $[0,\omega)$ isolated and neighborhoods of $\omega$ cofinite.

Defined as counterexample #89 ("Dieudonné Plank") in DOI 10.1007/978-1-4612-6290-9. Note that the pi-Base qualifies this name with "Deleted" to align with e.g. Tychonoff plank and Deleted Tychonoff plank.