Apply automatic rubocop fixes

app/views/code_ocean/files/show.json.jbuilder

@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 json.extract! @file, :id, :name_with_extension

app/views/comments/index.json.jbuilder

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 json.array!(@comments) do |comment|
   json.extract! comment, :id, :user_id, :file_id, :row, :column, :text, :username, :date, :updated, :editable
   json.url comment_url(comment, format: :json)

app/views/comments/show.json.jbuilder

@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 json.extract! @comment, :id, :user_id, :file_id, :row, :column, :text, :created_at, :updated_at

app/views/exercises/reload.json.jbuilder

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 json.set! :files do
   json.array! @exercise.files.visible, :content, :id
 end

app/views/file_types/show.json.jbuilder

@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 json.extract! @file_type, :id, :name, :editor_mode, :file_extension, :executable, :renderable, :binary

app/views/proxy_exercises/reload.json.jbuilder

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 json.set! :files do
   json.array! @exercise.files.visible, :content, :id
 end

app/views/request_for_comments/index.json.jbuilder

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 json.array!(@request_for_comments) do |request_for_comment|
   json.extract! request_for_comment, :id, :user_id, :exercise_id, :file_id, :user_type
   json.url request_for_comment_url(request_for_comment, format: :json)

app/views/request_for_comments/show.json.jbuilder

@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 json.extract! @request_for_comment, :id, :user_id, :exercise_id, :file_id, :created_at, :updated_at, :user_type, :solved

app/views/submissions/show.json.jbuilder

@@ -1,7 +1,10 @@
+# frozen_string_literal: true
+
 json.extract! @submission, :id, :files
 json.download_url download_submission_path(@submission, format: :json)
 json.score_url score_submission_path(@submission, format: :json)
-json.download_file_url download_file_submission_path(@submission, 'a.', format: :json).gsub(/a\.\.json$/, '{filename}.json')
+json.download_file_url download_file_submission_path(@submission, 'a.', format: :json).gsub(/a\.\.json$/,
+  '{filename}.json')
 json.render_url render_submission_path(@submission, 'a.', format: :json).gsub(/a\.\.json$/, '{filename}.json')
 json.run_url run_submission_path(@submission, 'a.', format: :json).gsub(/a\.\.json$/, '{filename}.json')
 json.test_url test_submission_path(@submission, 'a.', format: :json).gsub(/a\.\.json$/, '{filename}.json')