Another quick fix to remove the SRAM ndiffusion from rule DF.8,
for which it has its own exception.

gf180mcu/magic/gf180mcu.tech

diff --git a/gf180mcu/magic/gf180mcu.tech b/gf180mcu/magic/gf180mcu.tech
index 6cf47ae..f7188a4 100644
--- a/gf180mcu/magic/gf180mcu.tech
+++ b/gf180mcu/magic/gf180mcu.tech
@@ -3137,7 +3137,7 @@
  spacing *mvndiff,mvnvar,*srammvndiff *psd 360 touching_illegal \
 	 "Diffusion spacing to tap < %d (DF.3a)"
 
- spacing (*ndiff,*sramndiff,*ndiode,nfet,nnfet,ncap)/a allnwell 430 touching_illegal \
+ spacing (*ndiff,*ndiode,nfet,nnfet,ncap)/a allnwell 430 touching_illegal \
 	"N-Diffusion spacing to N-well < %d (DF.8)"
  spacing (*mvndiff,*mvndiode,mvnfet,mvncap,mvnnfet)/a allnwell 600 touching_illegal \
 	"N-Diffusion spacing to N-well < %d (DF.8)"