Fix suggestion on lines that are not part of an MR57953-fix-unfolded-diff-suggestions

Return the `text` as plain string in the response instead of
including HTML tags but keep `rich_text` as is.

The fix is to modify `Blob::UnfoldPresenter#diff_files` to map
each raw diff line (limited by the range specified) to a
corresponding line in an array of highlighted lines to use as
`rich_text`.

1 files changed, 4 insertions, 2 deletions

diff --git a/spec/presenters/blobs/unfold_presenter_spec.rb b/spec/presenters/blobs/unfold_presenter_spec.rb
index 7ece5f623ce..1534c572b30 100644
--- a/spec/presenters/blobs/unfold_presenter_spec.rb
+++ b/spec/presenters/blobs/unfold_presenter_spec.rb
@@ -54,8 +54,10 @@ describe Blobs::UnfoldPresenter do
         expect(lines.size).to eq(total_lines)
 
         lines.each.with_index do |line, index|
-          expect(line.text).to include("LC#{index + 1}")
-          expect(line.text).to eq(line.rich_text)
+          line_number = index + 1
+
+          expect(line.text).to eq(line_number.to_s)
+          expect(line.rich_text).to include("LC#{line_number}")
           expect(line.type).to be_nil
         end
       end