Equipped xorriso-dd-target -dummy_force example with -list_long

xorriso-dd-target/xorriso-dd-target.texi

@@ -394,7 +394,7 @@ program does not dare to perform.
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 Example:
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-$ xorriso-dd-target -with_sudo -dummy_force sdd \
+$ xorriso-dd-target -with_sudo -list_long -dummy_force sdd \
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     -image_file debian-live-10.0.0-amd64-xfce.iso
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@@ -402,6 +402,16 @@ $ xorriso-dd-target -with_sudo -dummy_force sdd \
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 sdd : NO  : usb+ has_iso9660+ has_vfat+ has_ext2- 
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+NAME    SIZE FSTYPE  TRAN LABEL
+@*
+sdd     3.8G iso9660 usb  d-live 9.5.0 xf i386
+@*
+├─sdd1  1.9G iso9660      d-live 9.5.0 xf i386
+@*
+├─sdd2  320K vfat         
+@*
+└─sdd3  512M ext2         
+@*
  
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 Overriding any advice because of -dummy_force