VM: Re-format to use at most one newline between functions

runtime/vm/instructions_arm64_test.cc

Index: runtime/vm/instructions_arm64_test.cc
diff --git a/runtime/vm/instructions_arm64_test.cc b/runtime/vm/instructions_arm64_test.cc
index 648ee17d733fd89517bd73f5b2784c790f7f2140..35ba23f92e31279dab2b2679048605ddfb013fd6 100644
--- a/runtime/vm/instructions_arm64_test.cc
+++ b/runtime/vm/instructions_arm64_test.cc
@@ -22,7 +22,6 @@ ASSEMBLER_TEST_GENERATE(Call, assembler) {
   __ ret();
 }
 
-
 ASSEMBLER_TEST_RUN(Call, test) {
   // The return address, which must be the address of an instruction contained
   // in the code, points to the Ret instruction above, i.e. one instruction
@@ -32,7 +31,6 @@ ASSEMBLER_TEST_RUN(Call, test) {
   EXPECT_EQ(StubCode::InvokeDartCode_entry()->code(), call.TargetCode());
 }
 
-
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64