[documentation] modifying links in admin/help in handbook to prevent

[Angie Byron]

> I can't believe I didn't think of that. What would work instead? Another
> character?

Well now that you have the different prefix on those items (drupal_base), I'd
say make them underscores like the rest.

Then I can make the script parse it so drupal_base_blah_blah == blah.blah and
drupal_link_blah_blah == blah/blah.

Blah blah blah.  ;)
-Angie