review formatting

omero/sysadmins/config.rst

@@ -2051,10 +2051,12 @@ omero.security.ignore_case
 Whether to ignore the case of the username during login (`true` or
 `false`). Default: `false` (JSmith and jsmith will be considered two
 different users).
+
 .. warning::
-   Before enabling this feature, lower the case of all usernames in OMERO
-   (`omename` column in the `experimenter` table). It is the system
-   administrator's responsibility to handle any username clashes.
+
+    Before enabling this feature, lower the case of all usernames in OMERO
+    (`omename` column in the `experimenter` table). It is the system
+    administrator's responsibility to handle any username clashes.
 
 Default: `false`