Internal oneboxes to posts that contained oneboxed github links to
commits or PRs with long enough commit messages to have the `show-more`
and the `excerpt hidden` classes in their html were being stripped of
their content resulting in empty internal oneboxes.
see: https://meta.discourse.org/t/269436
This fixes a regression introduced in:
0b3cf83e3c
When doing local oneboxes we sometimes want to allow
SVGs in the final preview HTML. The main case currently
is for the new cooked hashtags, which include an SVG
icon.
SVGs will be included in local oneboxes via `ExcerptParser` _only_
if they have the d-icon class, and if the caller for `post.excerpt`
specifies the `keep_svg: true` option.
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.
