refactor: init cypress-cucumber-preprocessor install.

node_modules/assertion-error-formatter/lib/helpers/unified_diff.js

@@ -0,0 +1,33 @@
+'use strict';Object.defineProperty(exports, "__esModule", { value: true });exports.default =
+
+unifiedDiff;var _diff = require('diff');function unifiedDiff(actual, expected, colorFns) {
+  var indent = '    ';
+  function cleanUp(line) {
+    if (line.length === 0) {
+      return '';
+    }
+    if (line[0] === '+') {
+      return indent + colorFns.diffAdded(line);
+    }
+    if (line[0] === '-') {
+      return indent + colorFns.diffRemoved(line);
+    }
+    if (line.match(/\@\@/)) {
+      return null;
+    }
+    if (line.match(/\\ No newline/)) {
+      return null;
+    }
+    return indent + line;
+  }
+  function notBlank(line) {
+    return typeof line !== 'undefined' && line !== null;
+  }
+  var msg = (0, _diff.createPatch)('string', actual, expected);
+  var lines = msg.split('\n').splice(4);
+  return '\n' + indent +
+  colorFns.diffAdded('+ expected') + ' ' +
+  colorFns.diffRemoved('- actual') +
+  '\n\n' +
+  lines.map(cleanUp).filter(notBlank).join('\n');
+}