C++: Inline expectation should have space after $

This was a regex-find-replace from `// \$(?! )` (using a negative lookahead) to `// $ `.

cpp/ql/test/library-tests/dataflow/fields/A.cpp

@@ -46,7 +46,7 @@ public:
   {
     C *c = new C();
     B *b = B::make(c);
-    sink(b->c); // $ast,ir
+    sink(b->c); // $ ast,ir
   }
 
   void f2()

cpp/ql/test/library-tests/dataflow/fields/C.cpp

@@ -26,9 +26,9 @@ public:
 
   void func()
   {
-    sink(s1); // $ast,ir
+    sink(s1); // $ ast,ir
     sink(s2); // $ MISSING: ast,ir
-    sink(s3); // $ast,ir
+    sink(s3); // $ ast,ir
     sink(s4); // $ MISSING: ast,ir
   }
 };

cpp/ql/test/library-tests/dataflow/fields/D.cpp

@@ -19,7 +19,7 @@ public:
   };
 
   static void sinkWrap(Box2* b2) {
-    sink(b2->getBox1()->getElem()); // $ast,ir=28:15 ast,ir=35:15 ast,ir=42:15 ast,ir=49:15
+    sink(b2->getBox1()->getElem()); // $ ast,ir=28:15 ast,ir=35:15 ast,ir=42:15 ast,ir=49:15
   }
 
   Box2* boxfield;

cpp/ql/test/library-tests/dataflow/fields/by_reference.cpp

@@ -48,25 +48,25 @@ struct S {
 void test_setDirectly() {
   S s;
   s.setDirectly(user_input());
-  sink(s.getDirectly()); // $ast ir
+  sink(s.getDirectly()); // $ ast ir
 }
 
 void test_setIndirectly() {
   S s;
   s.setIndirectly(user_input());
-  sink(s.getIndirectly()); // $ast ir
+  sink(s.getIndirectly()); // $ ast ir
 }
 
 void test_setThroughNonMember() {
   S s;
   s.setThroughNonMember(user_input());
-  sink(s.getThroughNonMember()); // $ast ir
+  sink(s.getThroughNonMember()); // $ ast ir
 }
 
 void test_nonMemberSetA() {
   S s;
   nonMemberSetA(&s, user_input());
-  sink(nonMemberGetA(&s)); // $ast,ir
+  sink(nonMemberGetA(&s)); // $ ast,ir
 }
 
 ////////////////////
@@ -112,7 +112,7 @@ void test_outer_with_ptr(Outer *pouter) {
   sink(outer.a); // $ ast,ir
 
   sink(pouter->inner_nested.a); // $ ast,ir
-  sink(pouter->inner_ptr->a); // $ast,ir
+  sink(pouter->inner_ptr->a); // $ ast,ir
   sink(pouter->a); // $ ast,ir
 }