Racket v9.3 Released with Markdown Docs and Faster Syntax Checking

Racket v9.3 is now available, bringing several notable improvements. The raco setup command can generate markdown documentation, and the teaching languages (BSL, ISL+, etc.) now match those selected via the Language dialog. DrRacket's background expansion disables errortrace annotations for faster syntax checking. New raco pkg install options offer more install-time flexibility. The ffi/unsafe/runtime-lib library gains define-runtime-lib, and the file/zip package provides enhanced control over zip file generation.