Whitespace fixup
Spell out "LessWrong wiki" on emails to users

[#61261016]
Clarify conditional in rightbox()

[#61261016]
Grammar nit: "an Less Wrong" -> "a Less Wrong"

[#61261016]
Rename WIKIERRORS to WIKI_ERRORS for consistency

[#61261016]
Fix link to user's wiki account page

[#61261016]
Correctly internationalise wiki account prefs link

[#61261016]
Whitespace fixup.
Handle final corner cases in wiki account creation and refactor

[#61261016]
Use the staging wiki, not the production one

[#61261016]
Add link to the root of the wiki to "user exists" email

[#61261016]
Only message users who we can actually make a linked account for

[#61261016]
Fix trivial mistakes

[#61261016]
Propagate errors in wiki account creation to the form

[#61261016]
Remove debugging code

[#61261016]
Fix incorrect call to urlencode

[#61261016]
Only show the wiki account preference tab if the user has an email

[#61261016]
Redirect '/prefs/wikiaccount' to '/prefs' if the user has an associated account

(or their account is __error__, in which case they still can't do
anything on that page)

In any case, they never see a link to /prefs/wikiaccount after their
account has been associated or marked __error__.
Fix links to the wiki's user create pages in email templates

[#61261016]
Whitespace fixup.