* Migrate core/utils/xml.js to ES6 const/let
* Migrate core/utils/xml.js to goog.module
The document() function is renamed to getDocument() so as to avoid
shadowing the global of the same name.
* clang-format core/utils/xml.js
* Call monkey-patchable exports.global internally too
This fixes Node test failures due to the monkey-patching of
Blockly.utils.xml.global in scripts/package/node/core.js not being
able to affect the target calls in createElement and createTextNode.
* Google changed from an Inc to an LLC.
This happened back in 2017 but we didn’t notice. Officially we should update files from Inc to LLC when they are changed as part of regular edits, but this is a nightmare to remember for the next decade.
* Remove project description/titles from licenses
This is no longer part of Google’s header requirements. Our existing descriptions were useless (“Visual Blocks Editor”) or grossly obselete (“Visual Blocks Language”).
* License no longer requires URL.
* Fix license regexps.
