[FIX] iot troubleshooting: involuntary line edit in previous commit

Relating to a ticket received recently.
Client was concerned about seeing multiple printers in CUPS
interface and in Odoo IoT app.
Turns out it's standard CUPS behaviour.
This commit updates the troubleshooting page to reflect this
information.

opw-3940166

content/applications/general/iot/config/troubleshooting.rst

@@ -504,6 +504,20 @@ template.
    Check out Zebra's instructions on printing :abbr:`ZPL (Zebra Programming Language)` files `here
    <https://supportcommunity.zebra.com/s/article/Print-a-zpl-file-using-the-Generic-Text-Printer>`_.
 
+The printer appears multiple times
+----------------------------------
+
+It is possible that a printer appears multiple times on the configuration page of the IoT box and/or
+in the IoT app. This is most likely due to a feature of CUPS, the printing service used by the IoT
+box. It looks at all the printers along with all the available drivers for that printer and displays
+as many lines as there are printer-driver pairs.
+You can safely pick whichever works best for you and disregard the other ones.
+Workarounds are discussed online to turn auto discovery off for CUPS.
+
+.. seealso::
+   The issue is discussed broadly online. In particular `here is a Stack Overflow discussion on the
+   topic <https://stackoverflow.com/questions/43198947/whats-the-difference-multiple-versions-of-the-same-printer-appearing-in-cups>`_.
+
 Barcode scanner
 ===============