Added dummy merge conflicts data.

app/assets/javascripts/merge_conflicts_data.coffee

+window.mergeConflictsData = {
+  "target_branch": "master",
+  "source_branch": "mc-ui",
+  "files": [
+    {
+      "commit_sha": "b5fa56eb3f2cea5e21c68b43c7c22b5b96e0e7b3",
+      "old_path": "lib/component.js",
+      "new_path": "lib/component.js",
+      "sections": [
+        {
+          "conflict": false,
+          "lines": [
+            {
+              "type": null,
+              "old_line": 206,
+              "new_line": 206,
+              "text": ""
+            },
+            {
+              "type": null,
+              "old_line": 207,
+              "new_line": 207,
+              "text": "var options = utils.merge.apply(utils, args);"
+            }
+          ]
+        },
+        {
+          "conflict": true,
+          "id": "section-id-123",
+          "lines": [
+            {
+              "type": "old",
+              "old_line": 208,
+              "new_line": null,
+              "text": "$(selector).each(function(i, rawNode) {"
+            },
+            {
+              "type": "old",
+              "old_line": 209,
+              "new_line": null,
+              "text": "var componentInfo = registry.findComponentInfo(this)"
+            },
+            {
+              "type": "old",
+              "old_line": 210,
+              "new_line": null,
+              "text": "if (componentInfo && componentInfo.isAttachedTo(rawNode)) {"
+            },
+            {
+              "type": "new",
+              "old_line": null,
+              "new_line": 208,
+              "text": "$(selector).each(function(i, node) {"
+            },
+            {
+              "type": "new",
+              "old_line": null,
+              "new_line": 209,
+              "text": "if (componentInfo && componentInfo.isAttachedTo(node)) {"
+            }
+          ]
+        },
+        {
+          "conflict": false,
+          "lines": [
+            {
+              "type": null,
+              "old_line": 211,
+              "new_line": 210,
+              "text": "return;"
+            },
+            {
+              "type": null,
+              "old_line": 212,
+              "new_line": 211,
+              "text": "}"
+            },
+            {
+              "type": null,
+              "old_line": null,
+              "new_line": 212,
+              "text": ""
+            },
+            {
+              "type": null,
+              "old_line": 213,
+              "new_line": 213,
+              "text": ""
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}