Use the EnforcedStyleForMultiline: no_comma option.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Don't accidentally mark unsafe diff lines as HTML safe

Fixes potential XSS issue when a legacy diff note is created on a merge
request whose diff contained HTML

See https://gitlab.com/gitlab-org/gitlab-ce/issues/25249

See merge request !2040

In the browser, we remove the + and - signs from the front of a diff
line because we add them in with CSS, so they aren't copied. We can't do
that in an email, because the CSS isn't supported, so we should keep
them in that case.

So we have raw_diffs too

Instead calling diff_collection.count use diff_collection.size which is cache on the diff_collection

Introducing the concept of SafeDiffs which relates 
diffs with UI highlighting.

1. Move render method to a concern, not a helper.
2. Let DiffHelper#diff_options automatically add the path option.
3. Move more instance var definitions to before filters.

Other diffs (those that are too large to render anyway, image diffs,
diffs suppressed by .gitattributes) should be rendered immediately.

With the option to expand and collapse individual diffs, these aren't
needed any more.

When rendering a list of diff files, skip those where the diff is over
10 KB and provide an endpoint to render individually instead.

Extract parts of LegacyDiffNote into DiffOnNote concern and move part of responsibility to other classes

Added more exceptions

Added handling inline view type

This reverts commit 13e37a3e.

added whitespace toggle to diffs page and set it to return the project compare path with the selected whitespace params

Updated CHANGELOG

Moved CHANGELOG entry

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

See #17478