STYLE: Code cleanup and add some comments

src/OpenFOAM/algorithms/dynamicIndexedOctree/dynamicIndexedOctree.H

@@ -25,7 +25,8 @@ Class
     Foam::dynamicIndexedOctree
 
 Description
-    Non-pointer based hierarchical recursive searching
+    Non-pointer based hierarchical recursive searching.
+    Storage is dynamic, so elements can be deleted.
 
 SourceFiles
     dynamicIndexedOctree.C
@@ -451,6 +452,7 @@ public:
             );
         }
 
+
     // Member Functions
 
         // Access
@@ -656,6 +658,7 @@ public:
 
             label removeIndex(const label nodIndex, const label index);
 
+
         // Write
 
             //- Print tree. Either print all indices (printContent = true) or
@@ -671,6 +674,7 @@ public:
 
             void writeTreeInfo() const;
 
+
     // IOstream Operators
 
         friend Ostream& operator<< <Type>