Correct indentation where appropriate for stanzas that should not be
rendered as `<blockquote>` HTML elements.

Closes GH-10686

Co-authored-by: Adam Turner <9087854+aa-turner@users.noreply.github.com>

* Delete jQuery and underscore.js

* Move underscores.js setup to searchtools.js

* Update jQuery.url(en|de)code

* Update jQuery.getQueryParameters

* Firefox bug is no longer present

xref https://bugzilla.mozilla.org/show_bug.cgi?id=645075#c49

* Update jQuery.fn.highlightText

* Use enum instead of magic number

* Update test descriptions to remove obsolete jQuery reference

* Update Documentation.getCurrentURL

* Revert accidental fix of Documentation.getCurrentURL

* Update Documentation.initOnKeyListeners

* Update Documentation.hideSearchWords

* Update Documentation.highlightSearchWords

* Update Documentation.initDomainIndexTable

* Use arrow functions and const

* Replace $(document).ready

* Strict mode

* Move Documentation.hideSearchWords next to Documentation.highlightSearchWords

* Update translation functions in Documentation

* Replace $(document).ready in searchtools.js

* Update Scorer

* Update Search.hasIndex, Search.deferQuery, Search.stopPulse

* Prefer window.location

* Update Search.init

* Update Search.loadIndex

* Update Search.setIndex

* Update Search.startPulse

* Add _escapeRegExp

* Update Search.makeSearchSummary

* Update Search.htmlToText

* Update Search.performSearch

* Factor out _displayNextItem

* Update Search.query

* Update Search.performObjectSearch

* Update Search.performTermsSearch

* Remove underscores.js setup

* Use Sets

* Update test configuration

* Fix test failures

* Drop unused make/get URL functions

* Strict mode in searchtools.js

* Remove outmoded check for jQuery and underscore.js

* Ran prettier

prettier --print-width 120 --no-semi --quote-props as-needed --no-bracket-spacing --arrow-parens avoid --write sphinx/themes/basic/static

* Remove more references to jQuery and underscore.js

* Remove jQuery and underscore.js licences

* Update classic theme for no jQuery

* Update all other themes for no jQuery

* Restore jQuery & underscores.js to Sphinx themes

Enables a more gradual deprecation

* Added deprecation note to CHANGES

* Run prettier with defaults

* Update deprecation message to include extensions, note that sources must be copied

* oops

* Address Pradyun's feedback

* Forgot this one

* `let` doesn't work, as it is scoped to the block...

* Remove missed jQuery in sphinx13 theme

To increse accessiblity of our docs, this changes the pygments_theme of
sphinx-docs.org to "default".  It was updated to meet WCAG AA in
https://github.com/pygments/pygments/pull/1940.

Spotted while navigating https://www.sphinx-doc.org/en/master/.