remove first empty paragraph on backspace

spec/content.spec.js

@@ -652,6 +652,22 @@ describe('Content TestCase', function () {
                 expect(this.el.innerHTML).toBe('<p>lorem ipsum</p><ul><li></li><li>lorem ipsum</li></ul>');
             });
         });
+
+        describe('within an empty paragraph which is the first element of the editor', function () {
+            it('should delete the paragraph and place the caret to the next paragraph', function () {
+                this.el.innerHTML = '<p class=""><br></p><p>test</p>';
+                var editor = this.newMediumEditor('.editor'),
+                    target = editor.elements[0].querySelector('p'),
+                    range;
+                placeCursorInsideElement(target, 0);
+                fireEvent(target, 'keydown', {
+                    keyCode: MediumEditor.util.keyCode.BACKSPACE
+                });
+                expect(this.el.innerHTML).toBe('<p>test</p>');
+                range = document.getSelection().getRangeAt(0);
+                expect(range.commonAncestorContainer.textContent).toBe('test');
+            });
+        });
     });
 
     describe('with header tags', function () {

src/js/core.js

@@ -152,6 +152,17 @@
             MediumEditor.selection.moveCursor(this.options.ownerDocument, p);
 
             event.preventDefault();
+        } else if (MediumEditor.util.isKey(event, MediumEditor.util.keyCode.BACKSPACE) &&
+                MediumEditor.util.isMediumEditorElement(node.parentElement) &&
+                !node.previousElementSibling &&
+                node.nextElementSibling &&
+                isEmpty.test(node.innerHTML)) {
+
+            // when cursor is in the first element, it's empty and user presses backspace,
+            // do delete action instead to get rid of the first element and move caret to 2nd
+            event.preventDefault();
+            MediumEditor.selection.moveCursor(this.options.ownerDocument, node.nextSibling);
+            node.parentElement.removeChild(node);
         }
     }