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

runtime/vm/disassembler.h

Index: runtime/vm/disassembler.h
diff --git a/runtime/vm/disassembler.h b/runtime/vm/disassembler.h
index 62eb06fa7af346ddb8d4cdccf959dd3b17ba6133..364f4f5765043fd0584beac2db03b1f9f1a60bf2 100644
--- a/runtime/vm/disassembler.h
+++ b/runtime/vm/disassembler.h
@@ -36,7 +36,6 @@ class DisassemblyFormatter {
   virtual void Print(const char* format, ...) = 0;
 };
 
-
 // Basic disassembly formatter that outputs the disassembled instruction
 // to stdout.
 class DisassembleToStdout : public DisassemblyFormatter {
@@ -59,7 +58,6 @@ class DisassembleToStdout : public DisassemblyFormatter {
   DISALLOW_COPY_AND_ASSIGN(DisassembleToStdout);
 };
 
-
 // Disassemble into a JSONStream.
 class DisassembleToJSONStream : public DisassemblyFormatter {
  public:
@@ -83,7 +81,6 @@ class DisassembleToJSONStream : public DisassemblyFormatter {
   DISALLOW_COPY_AND_ASSIGN(DisassembleToJSONStream);
 };
 
-
 // Disassemble instructions.
 class Disassembler : public AllStatic {
  public: