Documentation: dynamic-debug: fix wildcard description

Fix grammar about wildcards and insert a space between sentences.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Will Korteland <will@korte.land>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/admin-guide/dynamic-debug-howto.rst

@@ -110,8 +110,8 @@ If your query set is big, you can batch them too::
 
   ~# cat query-batch-file > <debugfs>/dynamic_debug/control
 
-A another way is to use wildcard. The match rule support ``*`` (matches
-zero or more characters) and ``?`` (matches exactly one character).For
+Another way is to use wildcards. The match rule supports ``*`` (matches
+zero or more characters) and ``?`` (matches exactly one character). For
 example, you can match all usb drivers::
 
   ~# echo "file drivers/usb/* +p" > <debugfs>/dynamic_debug/control