Improve doc (#1976)

doc/sources/admin/finduser.rst

@@ -27,11 +27,12 @@ Just enable it in the Manager (section “plugins”). Then, set searching attri
 
     You can provide a 'multiValuesSeparator' separated list of allowed searching values that will be displayed as an HTML <select> list.
 
-      uid#Identity   => dwho; Dr Who; rtyler; Rose Tyler; msmith; Mr Smith
+      attribute#placeholder[#empty] => value1; placeholder1; value2; placeholder2
 
-      uid#Identity#1 => dwho; Dr Who; rtyler; Rose Tyler (allow empty value)
+      -  By example:
+        uid#Identity   => dwho; Dr Who; rtyler; Rose Tyler; msmith; Mr Smith
 
-      attribute#placeholder[#empty] => value1; placeholder1; value2; placeholder2
+        uid#Identity#1 => dwho; Dr Who; rtyler; Rose Tyler (allow empty value)
 
       Entries are sorted by alphabetical order.