This change adds `target` to the set of attributes allowed by the
HTML sanitizer which is applied to the description of a user_field.
The rationale for this change:
* If one puts a link (<a>...</a>) in the description of a user_field
that is present and/or required at sign-up, the expectation is that
a prospective new user will click on that link during sign-up.
* Without an appropriate `target` attribute on the link, the new page
will be loaded in the same window/tab as the sign-up form, but this
will obliterate any fields that the user had already filled-out on
the form. (E.g., hitting the back-button will return to an
empty form.)
* Such UX behavior is incredibly aggravating to new users.
This change allows an admin to add a `target` attribute to links, to
instruct the browser to open them in a different window/tab, leaving
a sign-up form intact.
It's very easy to forget to add `require 'rails_helper'` at the top of every core/plugin spec file, and omissions can cause some very confusing/sporadic errors.
By setting this flag in `.rspec`, we can remove the need for `require 'rails_helper'` entirely.
* DEV: Sanitize HTML admin inputs
This PR adds on-save HTML sanitization for:
Client site settings
translation overrides
badges descriptions
user fields descriptions
I used Rails's SafeListSanitizer, which [accepts the following HTML tags and attributes](018cf54073/lib/rails/html/sanitizer.rb (L108))
* Make sure that the sanitization logic doesn't corrupt settings with special characters
This change both speeds up specs (less strings to allocate) and helps catch
cases where methods in Discourse are mutating inputs.
Overall we will be migrating everything to use #frozen_string_literal: true
it will take a while, but this is the first and safest move in this direction
