Log attributes after coercion

In addition to more accurately conveying what strings are committed to
the database, this also makes it possible to copy and paste log messages
right into IRB.

lib/ldaptic/methods.rb

@@ -248,19 +248,21 @@ def normalize_attributes(attributes)
 
     # Performs an LDAP add.
     def add(dn, attributes)
-      log_dispatch(:add, dn, attributes)
       attributes = normalize_attributes(attributes)
+      log_dispatch(:add, dn, attributes)
       adapter.add(dn, attributes)
     end
 
     # Performs an LDAP modify.
     def modify(dn, attributes)
-      log_dispatch(:modify, dn, attributes)
       if attributes.kind_of?(Hash)
         attributes = normalize_attributes(attributes)
       else
-        attributes = attributes.map {|(action, key, values)| [action, Ldaptic.encode(key), Array(values)]}
+        attributes = attributes.map do |(action, key, values)|
+          [action, Ldaptic.encode(key), values.respond_to?(:before_type_cast) ? values.before_type_cast : Array(values)]
+        end
       end
+      log_dispatch(:modify, dn, attributes)
       adapter.modify(dn, attributes) unless attributes.empty?
     end