Modified PPLUS and NPLUS layer generation operators in the cifoutput
section of the magic tech file, as they were missing the grow/shrink
operators needed to merge across narrow gaps.

sky130/magic/sky130.tech

diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 8c68327..d358d2a 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -797,6 +797,8 @@
 	and-not	CELLRING
 
  layer PPLUS basePPLUS,extendPPLUS 
+	grow	185
+	shrink	185
 	close   265000
 	calma	94 20
 
@@ -806,6 +808,8 @@
 	and-not	CELLRING
 
  layer NPLUS baseNPLUS,extendNPLUS
+	grow	185
+	shrink	185
  	close   265000
  	calma	93 44