…ve-duplicate-amp-scripts

* 'develop' of github.com:ampproject/amp-wp: (66 commits)
  Improve display of validation errors for scripts (#3722)
  Conditionally run E2E tests (#3723)
  Tidy up validation error details (#3721)
  Add missing space after sentence (#3720)
  Default to the homepage instead of fetching the first AMP compatible post to customize (#3715)
  Include text content of style element in validation error (#3717)
  Fix summarizing error sources both parent theme and child theme (#3709)
  Exclude WordPress.PHP.DisallowShortTernary phpcs sniff
  Fix phpcs issues with date() and current_time()
  Exclude Generic.Arrays.DisallowShortArraySyntax from WordPress-Core
  Update dependency wp-coding-standards/wpcs to v2.2.0
  Improve specificity of JS doc
  Fix identifying sources for validation errors coming child themes (#3708)
  Fix failing E2E tests (#3707)
  Remove amp_validate query var from Validated URL 'View' row action
  Re-factor get_html_attribute_pattern as match_element_attributes
  Quote variables added to regex pattern
  Replace incorrect usage of esc_url() with esc_url_raw()
  Remove empty alt attributes
  Add object-fit=contain to amp-youtube placeholder image
  ...

…ipts get removed

…ve-duplicate-amp-scripts

* 'develop' of github.com:ampproject/amp-wp:
  Manually add copies of AMP scripts rather than using wp_print_scripts()
  Add duplicate scripts to head as well
  Add test for removing duplicate scripts
  Bump stable tag to 1.4.1
  Update screenshots for 1.4.1
  Fix expected image name after upstream change (#3749)
  Use length property instead of count() method on DOMNodeList (#3727)