Need an explicit truncate command to shorten the length of a file.

programs/notepad/dialog.c

@@ -165,6 +165,7 @@ static VOID DoSaveFile(VOID)
     else
         SendMessage(Globals.hEdit, EM_SETMODIFY, FALSE, 0);
 
+    SetEndOfFile(hFile);
     CloseHandle(hFile);
     HeapFree(GetProcessHeap(), 0, pTemp);
 }