Fixed linter issues.

src/model/nodelist.js

@@ -186,7 +186,10 @@ export default class NodeList {
 				 *
 				 * @error nodelist-insertNodes-not-node
 				 */
-				throw new CKEditorError( 'model-nodelist-insertNodes-not-node: Trying to insert an object which is not a Node instance.', this);
+				throw new CKEditorError(
+					'model-nodelist-insertNodes-not-node: Trying to insert an object which is not a Node instance.',
+					this
+				);
 			}
 		}
 

src/model/schema.js

@@ -356,7 +356,10 @@ export default class Schema {
 				 *
 				 * @error schema-check-merge-no-element-before
 				 */
-				throw new CKEditorError( 'schema-check-merge-no-element-before: The node before the merge position must be an element.', this );
+				throw new CKEditorError(
+					'schema-check-merge-no-element-before: The node before the merge position must be an element.',
+					this
+				);
 			}
 
 			if ( !( nodeAfter instanceof Element ) ) {
@@ -365,7 +368,10 @@ export default class Schema {
 				 *
 				 * @error schema-check-merge-no-element-after
 				 */
-				throw new CKEditorError( 'schema-check-merge-no-element-after: The node after the merge position must be an element.', this );
+				throw new CKEditorError(
+					'schema-check-merge-no-element-after: The node after the merge position must be an element.',
+					this
+				);
 			}
 
 			return this.checkMerge( nodeBefore, nodeAfter );

src/model/treewalker.js

@@ -42,7 +42,10 @@ export default class TreeWalker {
 			 *
 			 * @error model-tree-walker-no-start-position
 			 */
-			throw new CKEditorError( 'model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.', this );
+			throw new CKEditorError(
+				'model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.',
+				null
+			);
 		}
 
 		const direction = options.direction || 'forward';

tests/controller/datacontroller.js

@@ -229,17 +229,15 @@ describe( 'DataController', () => {
 		it( 'should throw an error when non-existent root is used (single)', () => {
 			expectToThrowCKEditorError( () => {
 				data.init( { nonexistent: '<p>Bar</p>' } );
-			},
-				'datacontroller-init-non-existent-root: Attempting to init data on a non-existing root.'
-			);
+			}, /^datacontroller-init-non-existent-root:/ );
 		} );
 
 		it( 'should throw an error when non-existent root is used (one of many)', () => {
 			schema.extend( '$text', { allowIn: '$root' } );
 
 			expectToThrowCKEditorError( () => {
 				data.init( { main: 'bar', nonexistent: '<p>Bar</p>' } );
-			}, /datacontroller-init-non-existent-root:/, model );
+			}, /^datacontroller-init-non-existent-root:/, model );
 
 			expect( getData( model, { withoutSelection: true } ) ).to.equal( '' );
 		} );
@@ -319,7 +317,7 @@ describe( 'DataController', () => {
 
 			expectToThrowCKEditorError( () => {
 				data.set( { main: 'bar', nonexistent: '<p>Bar</p>' } );
-			}, /datacontroller-set-non-existent-root:/, model )
+			}, /datacontroller-set-non-existent-root:/, model );
 
 			expect( getData( model, { withoutSelection: true } ) ).to.equal( 'foo' );
 		} );

tests/conversion/upcastdispatcher.js

@@ -19,6 +19,7 @@ import ModelRange from '../../src/model/range';
 import ModelWriter from '../../src/model/writer';
 
 import first from '@ckeditor/ckeditor5-utils/src/first';
+import { expectToThrowCKEditorError } from '@ckeditor/ckeditor5-utils/tests/_utils/utils';
 
 describe( 'UpcastDispatcher', () => {
 	let model;

tests/view/node.js

@@ -9,7 +9,6 @@ import Node from '../../src/view/node';
 import DocumentFragment from '../../src/view/documentfragment';
 import RootEditableElement from '../../src/view/rooteditableelement';
 
-
 import createDocumentMock from '../../tests/view/_utils/createdocumentmock';
 import { expectToThrowCKEditorError } from '@ckeditor/ckeditor5-utils/tests/_utils/utils';