Minor comments (#998)

imgui.h

@@ -118,7 +118,7 @@ namespace ImGui
     IMGUI_API void          ShowUserGuide();                            // help block
     IMGUI_API void          ShowStyleEditor(ImGuiStyle* ref = NULL);    // style editor block. you can pass in a reference ImGuiStyle structure to compare to, revert to and save to (else it uses the default style)
     IMGUI_API void          ShowTestWindow(bool* p_open = NULL);        // test window demonstrating ImGui features
-    IMGUI_API void          ShowMetricsWindow(bool* p_open = NULL);     // metrics window for debugging ImGui
+    IMGUI_API void          ShowMetricsWindow(bool* p_open = NULL);     // metrics window for debugging ImGui (browse draw commands, individual vertices, window list, etc.)
 
     // Window
     IMGUI_API bool          Begin(const char* name, bool* p_open = NULL, ImGuiWindowFlags flags = 0);                                                   // push window to the stack and start appending to it. see .cpp for details. return false when window is collapsed, so you can early out in your code. 'bool* p_open' creates a widget on the upper-right to close the window (which sets your bool to false).