[lldb] Add some formatting to variable.rst (NFC)

Author: kastiglione

lldb/docs/use/variable.rst

@@ -1226,13 +1226,13 @@ By default, several categories are created in LLDB:
 - CoreServices: CS classes
 - VectorTypes: compact display for several vector types
 
-If you want to use a custom category for your formatters, all the type ... add
-provide a --category (-w) option, that names the category to add the formatter
+If you want to use a custom category for your formatters, all the ``type ... add``
+provide a ``--category`` (``-w``) option, that names the category to add the formatter
 to. To delete the formatter, you then have to specify the correct category.
 
 Categories can be in one of two states: enabled and disabled. A category is
-initially disabled, and can be enabled using the type category enable command.
-To disable an enabled category, the command to use is type category disable.
+initially disabled, and can be enabled using the ``type category enable`` command.
+To disable an enabled category, the command to use is ``type category disable``.
 
 The order in which categories are enabled or disabled is significant, in that
 LLDB uses that order when looking for formatters. Therefore, when you enable a