Fixed markup syntax on FQDN example

Author: tap1r

source/reference/connection-string.txt

@@ -168,7 +168,7 @@ like this:
    _mongodb._tcp.server.example.com. 86400 IN SRV   0        5      27017 mongodb2.example.com.
 
 .. note::
-  The hostnames returned in SRV records must share the same parent domain (in this example,``example.com``)
+  The hostnames returned in SRV records must share the same parent domain (in this example, ``example.com``)
   as the given hostname.
 
 The DNS seedlist connection string can also provide options as a query string, with a trailing "/?" as in