test cleanup
	- do not print tracebacks if $GOTRACEBACK=0
	- set GOTRACEBACK=0 during tests
	- filter out pc numbers in errors

R=r
DELTA=70  (22 added, 30 deleted, 18 changed)
OCL=15618
CL=15642
diff --git a/test/run b/test/run
index dc429dd..3617301 100755
--- a/test/run
+++ b/test/run
@@ -15,6 +15,7 @@
 
 export G=${A}g
 export L=${A}l
+export GOTRACEBACK=0
 
 failed=0
 
@@ -55,6 +56,9 @@
 	egrep -v '^(r[0-9a-z]+|[cfg]s)  +0x'  |
 	sed '/tmp.*Bus error/s/.*Bus/Bus/; /tmp.*Trace.BPT/s/.*Trace/Trace/
 		s!'$RUNFILE'!$RUNFILE!g
+		s/ PC=0x[0-9a-f]*/ PC=xxx/
+		s/^pc: 0x[0-9a-f]*/pc: xxx/
+		/^Trace\/breakpoint trap/d
 		/RUNFILE/ s/line 1: *[0-9]*/line 1: PID/' > run.out
 
 case $failed in