const runtime.tracebackOuterFrames

4 uses

	runtime (current package)
		traceback.go#L35: 	tracebackOuterFrames = 50
		traceback.go#L914: 		elide := remaining - lastN - tracebackOuterFrames
		traceback.go#L917: 			traceback2(&u2, showRuntime, lastN+elide, tracebackOuterFrames)
		traceback.go#L921: 			traceback2(&u2, showRuntime, lastN, tracebackOuterFrames)