Closes gh-10824

* pr/10811:
  Fix typos in ApplicationArguments and Library

Closes gh-10811

Closes gh-10826

Closes gh-9850

Closes gh-7107

Closes gh-10819

See gh-10817

This commit updates `WebFluxSecurityConfiguration` to look for a
`WebFilterChainProxy` rather than the default configuration that
`@EnableWebFluxSecurity` triggers. The latter is now package private.

* pr/10805:
  Remove unnecessary assignments

Closes gh-10805

* pr/10806:
  Handle null early in Sanitizer.sanitize()

Closes gh-10806

* pr/10810:
  Fix typos in AutoConfigureRestDocs

Closes gh-10810

* gh-10764:
  Wrap using-spring-boot.adoc at 90 characters
  Editorial changes to Using Spring Boot documentation

Closes gh-10765

See gh-10765

* gh-10763:
  Wrap getting-started.adoc at 90 characters
  Editorial changes to Getting Started documentation

Closes gh-10763

See gh-10763

See gh-10754

Closes gh-10758

* pr/10612:
  Polish JobLauncherCommandLineRunner

The JobLauncherCommandLineRunner reassigned method arguments inside the
merge method. Instead of reassigning the method argument just return
the new instance directly.

Also some minor cleanup (unnesseccary null check and continue keyword).

Closes gh-10612

* pr/10774:
  Remove static Boot version from documentation

Closes gh-10774