Modified the "fake diode" layout to include a square of unconnected pdiff on the
top side, which helps to prevent issues with FOM density.

sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fakediode_2.gds

diff --git a/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fakediode_2.gds b/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fakediode_2.gds
index 9fe03d9..1f7642f 100644
--- a/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fakediode_2.gds
+++ b/sky130/custom/sky130_fd_sc_hd/gds/sky130_ef_sc_hd__fakediode_2.gds
Binary files differ