update comments for http diagnostic port

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCoreDebug.java

Index: editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCoreDebug.java
diff --git a/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCoreDebug.java b/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCoreDebug.java
index c03dfe8522a90eafa26f6821ec7af896f5966c97..8e2565fa8d1681623a35aa9ee56356c7960d2d2d 100644
--- a/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCoreDebug.java
+++ b/editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/DartCoreDebug.java
@@ -76,10 +76,12 @@ public class DartCoreDebug {
 
   public static final String ANALYSIS_SERVER_INSTRUMENTATION_LOG_FILE = getOptionValue("experimental/analysisServer/instrumentationLogFile");
 
+  // http diagnostic port 
   public static final String ANALYSIS_SERVER_HTTP_PORT_PREF = "analysisServerHttpPort";
   public static final String ANALYSIS_SERVER_HTTP_PORT = getOptionOrPrefValue(
       "experimental/analysisServer/http_port",
       ANALYSIS_SERVER_HTTP_PORT_PREF);
+
   public static final String ENABLE_NEW_FORMATTER_PREF = "experimental/newFormatter";
   public static final String ANALYSIS_SERVER_LOG_FILE = getOptionValue("experimental/analysisServer/logFile");
   public static final boolean ANALYSIS_SERVER_PRINT_TO_CONSOLE = isOptionTrue("experimental/analysisServer/printToConsole");