Flag multiple empty lines in eslint, fix offenses.

.eslintrc

@@ -15,6 +15,7 @@
     "filenames"
   ],
   "rules": {
-    "filenames/match-regex": [2, "^[a-z0-9_]+(.js)?$"]
+    "filenames/match-regex": [2, "^[a-z0-9_]+(.js)?$"],
+    "no-multiple-empty-lines": ["error", { "max": 1 }]
   }
 }

app/assets/javascripts/environments/environments_bundle.js.es6

@@ -3,7 +3,6 @@
 //= require ./components/environment
 //= require ./vue_resource_interceptor
 
-
 $(() => {
   window.gl = window.gl || {};
 

app/assets/javascripts/issues_bulk_assignment.js.es6

@@ -61,7 +61,6 @@
       return labels;
     }
 
-
     /**
      * Will return only labels that were marked previously and the user has unmarked
      * @return {Array} Label IDs
@@ -80,7 +79,6 @@
       return result;
     }
 
-
     /**
      * Simple form serialization, it will return just what we need
      * Returns key/value pairs from form data

app/assets/javascripts/notes.js

@@ -220,7 +220,6 @@
       })(this));
     };
 
-
     /*
     Increase @pollingInterval up to 120 seconds on every function call,
     if `shouldReset` has a truthy value, 'null' or 'undefined' the variable
@@ -244,7 +243,6 @@
       return this.initRefresh();
     };
 
-
     Notes.prototype.handleCreateChanges = function(note) {
       if (typeof note === 'undefined') {
         return;
@@ -294,7 +292,6 @@
       }
     };
 
-
     /*
     Check if note does not exists on page
      */
@@ -307,7 +304,6 @@
       return this.view === 'parallel';
     };
 
-
     /*
     Render note in discussion area.
 
@@ -358,7 +354,6 @@
       return this.updateNotesCount(1);
     };
 
-
     /*
     Called in response the main target form has been successfully submitted.
 
@@ -390,7 +385,6 @@
       return form.find(".js-note-text").trigger("input");
     };
 
-
     /*
     Shows the main form and does some setup on it.
 
@@ -415,7 +409,6 @@
       return this.parentTimeline = form.parents('.timeline');
     };
 
-
     /*
     General note form setup.
 
@@ -432,7 +425,6 @@
       return new Autosave(textarea, ["Note", form.find("#note_noteable_type").val(), form.find("#note_noteable_id").val(), form.find("#note_commit_id").val(), form.find("#note_type").val(), form.find("#note_line_code").val(), form.find("#note_position").val()]);
     };
 
-
     /*
     Called in response to the new note form being submitted
 
@@ -448,7 +440,6 @@
       return new Flash('Your comment could not be submitted! Please check your network connection and try again.', 'alert', this.parentTimeline);
     };
 
-
     /*
     Called in response to the new note form being submitted
 
@@ -473,7 +464,6 @@
       this.removeDiscussionNoteForm($form);
     };
 
-
     /*
     Called in response to the edit note form being submitted
 
@@ -498,7 +488,6 @@
       }
     };
 
-
     Notes.prototype.checkContentToAllowEditing = function($el) {
       var initialContent = $el.find('.original-note-content').text().trim();
       var currentContent = $el.find('.note-textarea').val();
@@ -522,7 +511,6 @@
       return isAllowed;
     };
 
-
     /*
     Called in response to clicking the edit note link
 
@@ -551,7 +539,6 @@
       this.putEditFormInPlace($target);
     };
 
-
     /*
     Called in response to clicking the edit note link
 
@@ -596,7 +583,6 @@
       return form.find('.js-note-text').val(form.find('form.edit-note').data('original-note'));
     };
 
-
     /*
     Called in response to deleting a note of any kind.
 
@@ -636,7 +622,6 @@
       return this.updateNotesCount(-1);
     };
 
-
     /*
     Called in response to clicking the delete attachment link
 
@@ -653,7 +638,6 @@
       return note.find(".current-note-edit-form").remove();
     };
 
-
     /*
     Called when clicking on the "reply" button for a diff line.
 
@@ -673,7 +657,6 @@
       return this.setupDiscussionNoteForm(replyLink, form);
     };
 
-
     /*
     Shows the diff or discussion form and does some setup on it.
 
@@ -715,7 +698,6 @@
         .addClass("discussion-form js-discussion-note-form");
     };
 
-
     /*
     Called when clicking on the "add a comment" button on the side of a diff line.
 
@@ -772,7 +754,6 @@
       }
     };
 
-
     /*
     Called in response to "cancel" on a diff note form.
 
@@ -806,7 +787,6 @@
       return this.removeDiscussionNoteForm(form);
     };
 
-
     /*
     Called after an attachment file has been selected.
 
@@ -821,7 +801,6 @@
       return form.find(".js-attachment-filename").text(filename);
     };
 
-
     /*
     Called when the tab visibility changes
      */

changelogs/unreleased/newline-eslint-rule.yml

+---
+title: Flag multiple empty lines in eslint, fix offenses.
+merge_request: 8137
+author:

spec/javascripts/abuse_reports_spec.js.es6

@@ -21,7 +21,6 @@
       messages = $('.abuse-reports .message');
     });
 
-
     it('should truncate long messages', () => {
       const $longMessage = findMessage('LONG MESSAGE');
       expect($longMessage.data('original-message')).toEqual(jasmine.anything());

spec/javascripts/environments/environment_rollback_spec.js.es6

@@ -33,7 +33,6 @@ describe('Rollback Component', () => {
     expect(component.$el.querySelector('span').textContent).toContain('Re-deploy');
   });
 
-
   it('Should render Rollback label when isLastDeployment is false', () => {
     const component = new window.gl.environmentsList.RollbackComponent({
       el: document.querySelector('.test-dom-element'),