minor
Update wcf-tutorial.md

Corrección al parámetro del behavior para usar el token de delegación obtenido.
Fixing prettyprint styling every <pre /> when there was no need. Only styling <pre /> that have inside a <code /> tag.
Merge pull request #45 from nicosabena/patch-1

Update wcf-tutorial.md
Change prettyprint to be applied only to pre elements outside the API Explorer.
fixes
fixes