diff --git a/scintilla/deelx/deelx64.h b/scintilla/deelx/deelx64.h
index a63a33648..dab7bfccc 100644
--- a/scintilla/deelx/deelx64.h
+++ b/scintilla/deelx/deelx64.h
@@ -10,10 +10,14 @@
 // Author: Ê·ÊÙΰ (sswater shi)
 // sswater@gmail.com
 //
-// $Revision $
-//
 // + adaption for 64-bit usage: "basetsd : INT_PTR" replaces int-pointer arithmetic and buffer indexes
 // + Cppcheck cleanup 
+//
+// Good Overview:
+// https://www.regular-expressions.info/
+// 
+
+
 
 #ifndef __DEELX_REGEXP64__H__
 #define __DEELX_REGEXP64__H__
diff --git a/src/Edit.c b/src/Edit.c
index aa1a64fa7..d7fa03eb9 100644
--- a/src/Edit.c
+++ b/src/Edit.c
@@ -5087,6 +5087,9 @@ char* __fastcall EditGetReplaceString(HWND hwnd, LPCEDITFINDREPLACE lpefr, int*
 //
 BOOL EditReplace(HWND hwnd, LPCEDITFINDREPLACE lpefr) {
 
+  // reject to replace zero-length matches -> EditPaste()
+  // see also: https://www.regular-expressions.info/zerolength.html
+  //
   if ((BOOL)SendMessage(hwnd, SCI_GETSELECTIONEMPTY, 0, 0))
     return EditFindNext(hwnd, lpefr, FALSE);