Links to internal anchors in the Page engine page (and perhaps other pages) don't work

[divdavem]

In the following page:
http://ariatemplates.com/usermanual/latest/page_engine
Click on the link "later" in the "Getting started" section... but nothing happens.
That's because the link targets the following url:
http://ariatemplates.com/usermanual/latest/page_engine#Page_providers
Which does not match the name of the anchor. The following link works fine:
http://ariatemplates.com/usermanual/latest/page_engine#page-providers
It is the same with all the internal links of this page.

This error probably comes from the difference in the way anchor names were generated with MediaWiki and are now with the new system.
This probably may also happen in other pages as well (I did not check).

[benouat]

You are right @divdavem !
All the internal anchors that were generated by the original Mediawiki install we had are now wrong.

We need to change them all.