This PR applies a one character fix in the function plot_3d_single_patch which would previously calculate the surface $\lbrace (x, y{\text{max}}, z) | (x, z) \in [x{\text{min}}, x{\text{max}}] \times [z{\text{min}}, z{\text{max}}] \rbrace$ using $x{\text{max}}$ instead of $y_{\text{max}}$.
This PR applies a one character fix in the function
plot_3d_single_patch
which would previously calculate the surface $\lbrace (x, y{\text{max}}, z) | (x, z) \in [x{\text{min}}, x{\text{max}}] \times [z{\text{min}}, z{\text{max}}] \rbrace$ using $x{\text{max}}$ instead of $y_{\text{max}}$.