lldb/test/Shell/Driver/TestQuiet.test - llvm-project - Git at Google

 RUN: %lldb -b -Q -o "expr 40 + 2" | FileCheck %s
 RUN: %lldb -b -Q -O "expr 40 + 2" | FileCheck %s

 CHECK-NOT: expr
 CHECK-NOT: lldb
 CHECK-NOT: source
 CHECK: 42
	RUN: %lldb -b -Q -o "expr 40 + 2" \| FileCheck %s
	RUN: %lldb -b -Q -O "expr 40 + 2" \| FileCheck %s

	CHECK-NOT: expr
	CHECK-NOT: lldb
	CHECK-NOT: source
	CHECK: 42