Move the diff_file utility into the utils folder

app/assets/javascripts/diffs/components/diff_file.vue

@@ -10,7 +10,7 @@ import notesEventHub from '../../notes/event_hub';
 import DiffFileHeader from './diff_file_header.vue';
 import DiffContent from './diff_content.vue';
 import { diffViewerErrors } from '~/ide/constants';
-import { collapsedType, isCollapsed } from '../diff_file';
+import { collapsedType, isCollapsed } from '../utils/diff_file';
 import {
   DIFF_FILE_AUTOMATIC_COLLAPSE,
   DIFF_FILE_MANUAL_COLLAPSE,

app/assets/javascripts/diffs/components/diff_file_header.vue

@@ -19,7 +19,7 @@ import { __, s__, sprintf } from '~/locale';
 import { diffViewerModes } from '~/ide/constants';
 import DiffStats from './diff_stats.vue';
 import { scrollToElement } from '~/lib/utils/common_utils';
-import { isCollapsed } from '../diff_file';
+import { isCollapsed } from '../utils/diff_file';
 import { DIFF_FILE_HEADER } from '../i18n';
 
 export default {

app/assets/javascripts/diffs/store/actions.js

@@ -49,7 +49,7 @@ import {
   DIFF_FILE_BY_FILE_COOKIE_NAME,
 } from '../constants';
 import { diffViewerModes } from '~/ide/constants';
-import { isCollapsed } from '../diff_file';
+import { isCollapsed } from '../utils/diff_file';
 
 export const setBaseConfig = ({ commit }, options) => {
   const {

app/assets/javascripts/diffs/store/utils.js

@@ -16,7 +16,7 @@ import {
   SHOW_WHITESPACE,
   NO_SHOW_WHITESPACE,
 } from '../constants';
-import { prepareRawDiffFile } from '../diff_file';
+import { prepareRawDiffFile } from '../utils/diff_file';
 
 export const isAdded = line => ['new', 'new-nonewline'].includes(line.type);
 export const isRemoved = line => ['old', 'old-nonewline'].includes(line.type);

app/assets/javascripts/diffs/diff_file.js → app/assets/javascripts/diffs/utils/diff_file.js

@@ -3,7 +3,7 @@ import {
   DIFF_FILE_DELETED_MODE,
   DIFF_FILE_MANUAL_COLLAPSE,
   DIFF_FILE_AUTOMATIC_COLLAPSE,
-} from './constants';
+} from '../constants';
 
 function fileSymlinkInformation(file, fileList) {
   const duplicates = fileList.filter(iteratedFile => iteratedFile.file_hash === file.file_hash);

app/assets/javascripts/notes/components/diff_with_note.vue

@@ -7,7 +7,7 @@ import DiffViewer from '~/vue_shared/components/diff_viewer/diff_viewer.vue';
 import ImageDiffOverlay from '~/diffs/components/image_diff_overlay.vue';
 import { getDiffMode } from '~/diffs/store/utils';
 import { diffViewerModes } from '~/ide/constants';
-import { isCollapsed } from '../../diffs/diff_file';
+import { isCollapsed } from '../../diffs/utils/diff_file';
 
 const FIRST_CHAR_REGEX = /^(\+|-| )/;
 

spec/frontend/diffs/diff_file_spec.js → spec/frontend/diffs/utils/diff_file_spec.js

-import { prepareRawDiffFile } from '~/diffs/diff_file';
+import { prepareRawDiffFile } from '~/diffs/utils/diff_file';
 
 const DIFF_FILES = [
   {