auto_link anchor's error of module TextHelper

Module: ActionView::Helpers::TextHelper Method: auto_link

e.g. >> helper.auto_link("http://of.openfoundry.org/projects/492/download#4th.Release.3") => "http://of.openfoundry.org/projects/492/download#4th.Release.3"

but, name roles can using periods (".").

HTML name attribute's roles below: Naming rules:(from http://www.w3schools.com/tags/at...

* Must begin with a letter A-Z or a-z
* Can be followed by: letters (A-Za-z), digits (0-9), hyphens ("-"), underscores ("_), colons (), and periods (".")
* Values are case-sensitive