sbcl-doc 2:2.2.9-1ubuntu1 (arm64 binary) in ubuntu lunar

 This package provides documentation for SBCL -- a development
 environment for the ANSI Common Lisp language.
 .
 The documents in this package cover SBCL-specific extensions to the
 language, explain how to use this Common Lisp implementation and how
 it differs from the ANSI standard.
 .
 The manual about SBCL's internals is also included in this package
 and may be of interest for people who intent to work with SBCL's
 source code.