Fix spacing for JSCollection, JSSet, and JSMap.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c2421d019efcf51a71de4167346edb0f305fda2c..fff1ccbc89c001a4d23f3f739e3b85bb4447626b 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -9651,7 +9651,7 @@ class JSFunctionProxy: public JSProxy {
 };
 
 
-class JSCollection : public JSObject {
+class JSCollection: public JSObject {
  public:
   // [table]: the backing hash table
   DECL_ACCESSORS(table, Object)
@@ -9665,7 +9665,7 @@ class JSCollection : public JSObject {
 
 
 // The JSSet describes EcmaScript Harmony sets
-class JSSet : public JSCollection {
+class JSSet: public JSCollection {
  public:
   DECLARE_CAST(JSSet)
 
@@ -9682,7 +9682,7 @@ class JSSet : public JSCollection {
 
 
 // The JSMap describes EcmaScript Harmony maps
-class JSMap : public JSCollection {
+class JSMap: public JSCollection {
  public:
   DECLARE_CAST(JSMap)