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

runtime/vm/hash_table.h

Index: runtime/vm/hash_table.h
diff --git a/runtime/vm/hash_table.h b/runtime/vm/hash_table.h
index 61db830478575487cb3f8240aceea7d5df84924f..06b97d3ad8771aacd2dda6d195f0e430d14431d5 100644
--- a/runtime/vm/hash_table.h
+++ b/runtime/vm/hash_table.h
@@ -55,7 +55,6 @@ namespace dart {
 // KeyTraits methods must not run Dart code (since the C++ code doesn't check
 // for concurrent modification).
 
-
 // Open-addressing hash table template using a RawArray as backing storage.
 //
 // The elements of the array are partitioned into entries:
@@ -383,7 +382,6 @@ class HashTable : public ValueObject {
   friend class HashTables;
 };
 
-
 // Table with unspecified iteration order. No payload overhead or metadata.
 template <typename KeyTraits, intptr_t kUserPayloadSize>
 class UnorderedHashTable : public HashTable<KeyTraits, kUserPayloadSize, 0> {
@@ -419,7 +417,6 @@ class UnorderedHashTable : public HashTable<KeyTraits, kUserPayloadSize, 0> {
   // No extra book-keeping needed for Initialize, InsertKey, DeleteEntry.
 };
 
-
 class HashTables : public AllStatic {
  public:
   // Allocates and initializes a table.
@@ -503,7 +500,6 @@ class HashTables : public AllStatic {
   }
 };
 
-
 template <typename BaseIterTable>
 class HashMap : public BaseIterTable {
  public:
@@ -589,7 +585,6 @@ class HashMap : public BaseIterTable {
   }
 };
 
-
 template <typename KeyTraits>
 class UnorderedHashMap : public HashMap<UnorderedHashTable<KeyTraits, 1> > {
  public:
@@ -601,7 +596,6 @@ class UnorderedHashMap : public HashMap<UnorderedHashTable<KeyTraits, 1> > {
       : BaseMap(key, value, data) {}
 };
 
-
 template <typename BaseIterTable>
 class HashSet : public BaseIterTable {
  public:
@@ -678,7 +672,6 @@ class HashSet : public BaseIterTable {
   }
 };
 
-
 template <typename KeyTraits>
 class UnorderedHashSet : public HashSet<UnorderedHashTable<KeyTraits, 0> > {
  public: