[FIX] removed space if only first name or last name

firstname_display_name_trigger/res_partner.py

@@ -37,7 +37,9 @@ class ResPartner(orm.Model):
             ids = [ids]
         res = []
         for record in self.browse(cr, uid, ids, context=context):
-            name = '%s %s'%(record.lastname if record.lastname else u"",
+            name = '%s%s%s' % (record.lastname if record.lastname else u"",
+                               u" " if record.firstname and record.lastname
+                                    else u"",
                                record.firstname if record.firstname else u"")
             if record.parent_id and not record.is_company:
                 name =  "%s, %s" % (record.parent_id.name, name)