`jest-docblock` is a package that can extract and parse a specially-formatted comment called a "docblock" at the top of a file. 

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Object.defineProperty(exports, '__esModule', {

exports.parseWithComments = parseWithComments;

  const data = _interopRequireDefault(require('detect-newline'));

  _detectNewline = function _detectNewline() {

  return obj && obj.__esModule ? obj : {default: obj};

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

const docblockRe = /^\s*(\/\*\*?(.|\r?\n)*?\*\/)/;

const lineCommentRe = /(^|\s+)\/\/([^\r\n]*)/g;

const multilineRe = /(?:^|\r?\n) *(@[^\r\n]*?) *\r?\n *(?![^@\r\n]*\/\/[^]*)([^@\r\n\s][^@\r\n]+?) *\r?\n/g;

const propertyRe = /(?:^|\r?\n) *@(\S+) *([^\r\n]*)/g;

const stringStartRe = /(\r?\n|^) *\* ?/g;

  const match = contents.match(docblockRe);

  return match ? match[0].trimLeft() : '';

  return match && match[0] ? contents.substring(match[0].length) : contents;

  return parseWithComments(docblock).pragmas;

  const line = (0, _detectNewline().default)(docblock) || _os().EOL;

    .replace(stringStartRe, '$1'); // Normalize multi-line directives

    docblock = docblock.replace(multilineRe, `${line}$1 $2${line}`);

  docblock = docblock.replace(ltrimNewlineRe, '').trimRight();

  while ((match = propertyRe.exec(docblock))) {

    const nextPragma = match[2].replace(lineCommentRe, '');

      typeof result[match[1]] === 'string' ||

      result[match[1]] = [].concat(result[match[1]], nextPragma);

function print({comments = '', pragmas = {}}) {

  const line = (0, _detectNewline().default)(comments) || _os().EOL;

    .map(key => printKeyValues(key, pragmas[key]))

    .reduce((arr, next) => arr.concat(next), [])

    .map(keyValue => start + ' ' + keyValue + line)

    if (keys.length === 1 && !Array.isArray(pragmas[keys[0]])) {

      return `${head} ${printKeyValues(keys[0], value)[0]}${tail}`;

      .map(textLine => `${start} ${textLine}`)

    "url": "https://github.com/facebook/jest.git"

  "gitHead": "c7caa7ba5904d0c61e586694cde5f536639e4afc"

  "gitHead": "722049ccd66947d48296dcb666bc99fccab86065"

		@@ -37,3 +37,3 @@ 'use strict';
		/**
		* Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
		* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
		*
		@@ -40,0 +40,0 @@ * This source code is licensed under the MIT license found in the

		{
		"name": "jest-docblock",
		"version": "24.0.0-alpha.9",
		"version": "24.0.0-alpha.10",
		"repository": {
		@@ -16,3 +16,3 @@ "type": "git",
		},
		"gitHead": "c7caa7ba5904d0c61e586694cde5f536639e4afc"
		"gitHead": "722049ccd66947d48296dcb666bc99fccab86065"
		}

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