I want to give feedback to this page since I am missing something.
I have a login for this site, but since the page is immutable, I can't change it.
How can I give feedback if I am missing something an a wiki.ubuntu.com page?
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EDIT: Ever since the bad people with bad intentions wreaking havoc on the wiki pages daily incidents of June 2016, the original answer here has been obsolete.
DO NOT submit a bug report to the Ubuntu-Docs project about immutable wiki pages. It will get set to "INVALID" status.
That is odd, the page is not immutable for me. For immutable pages you can file a bug report on Lauchpad under the ubuntu-docs project. However, note that if the page is not actually immutable the bug report will be set to invalid.
Note also that there is often confusion about the login requirements and people often think a page is immutable when it is not. This page should help.
A page will pretend to be Immutable until
IRC channel #ubuntu-doc on freenode helped me out.