Make comment more concise
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 1717e0a..4d3d84b 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -739,7 +739,7 @@
 

 const char* XMLNode::Value() const 

 {

-    // Catch an edge case: XMLDocuments don't have a a Value. Carefully return nullptr.

+    // Edge case: XMLDocuments don't have a Value. Return null.

     if ( this->ToDocument() )

         return 0;

     return _value.GetStr();