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

runtime/vm/zone_text_buffer.cc

Index: runtime/vm/zone_text_buffer.cc
diff --git a/runtime/vm/zone_text_buffer.cc b/runtime/vm/zone_text_buffer.cc
index 172940303032e8cb92401e027f2010287baa4adb..43a90e74e3c3e80bd91906fda4ad358efa8ac5db 100644
--- a/runtime/vm/zone_text_buffer.cc
+++ b/runtime/vm/zone_text_buffer.cc
@@ -20,7 +20,6 @@ ZoneTextBuffer::ZoneTextBuffer(Zone* zone, intptr_t initial_capacity)
   buffer_[length_] = '\0';
 }
 
-
 intptr_t ZoneTextBuffer::Printf(const char* format, ...) {
   va_list args;
   va_start(args, format);
@@ -43,12 +42,10 @@ intptr_t ZoneTextBuffer::Printf(const char* format, ...) {
   return len;
 }
 
-
 void ZoneTextBuffer::AddString(const char* s) {
   Printf("%s", s);
 }
 
-
 void ZoneTextBuffer::EnsureCapacity(intptr_t len) {
   intptr_t remaining = capacity_ - length_;
   if (remaining <= len) {