Documentation: fb: udlfb: clean up text and formatting

Clean up punctuation, spelling, and formatting for command line usage
and modprobe config file usage in udlfb.rst.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Bernie Thompson <bernie@plugable.com>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: Helge Deller <deller@gmx.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220828192501.14232-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/fb/udlfb.rst

@@ -86,16 +86,23 @@ Module Options
 Special configuration for udlfb is usually unnecessary. There are a few
 options, however.
 
-From the command line, pass options to modprobe
+From the command line, pass options to modprobe::
+
   modprobe udlfb fb_defio=0 console=1 shadow=1
 
-Or modify options on the fly at /sys/module/udlfb/parameters directory via
-sudo nano fb_defio
-change the parameter in place, and save the file.
+Or change options on the fly by editing
+/sys/module/udlfb/parameters/PARAMETER_NAME ::
 
-Unplug/replug USB device to apply with new settings
+  cd /sys/module/udlfb/parameters
+  ls # to see a list of parameter names
+  sudo nano PARAMETER_NAME
+  # change the parameter in place, and save the file.
+
+Unplug/replug USB device to apply with new settings.
+
+Or to apply options permanently, create a modprobe configuration file
+like /etc/modprobe.d/udlfb.conf with text::
 
-Or for permanent option, create file like /etc/modprobe.d/udlfb.conf with text
   options udlfb fb_defio=0 console=1 shadow=1
 
 Accepted boolean options: