Install ob-racket', racket', and `sicp'

README.org

@@ -1920,13 +1920,13 @@ a LaTeX file that sets ~TeX-master~.  The list below summarizes the main [[https
 configuration objectives:
 1. Listing [[lst:set-tex-options]] ensures installation of [[https://en.wikipedia.org/wiki/AUCTeX][AUCTeX]] and initializes
    [[https://en.wikipedia.org/wiki/AUCTeX][AUCTeX]] properly for =LuaTeX= or =LuaLaTeX=.
-2. Listing [[lst:set-tex-options]] also enables [[https://git.savannah.gnu.org/cgit/auctex.git/patch/?id=f464242eab092e610dda6b654e6fd197ef649d3eAA][indenting between square brackets]]
+2. Listing [[lst:set-tex-options]] also enables *indenting between square brackets*
    which is a recent feature.
 3. Listing [[lst:update-lualatex-opentype-font-name-database]] defines a function to
    update the =OpenType Font= name database for =LuaLaTeX= when the output of
    =LuaLaTeX= shows missing fonts.
-4. Listing [[lst:set-bibtex-options]] configures the Emacs =bibtex= library to use the
-   LaTeX =BiBTeX= dialect for backwards compatibility.
+4. Listing [[lst:set-bibtex-options]] configures the Emacs =bibtex= library to use
+   the LaTeX =BiBTeX= dialect for backwards compatibility.
 5. Listing [[lst:set-font-latex-options]] disables font scaling of section titles.
 6. Listing [[lst:set-latex-options]] configures =latex= for a full featured
    =LaTeX-section-command=.
@@ -2152,6 +2152,7 @@ list detailing and motivating each listing:
      (perl . t)
      ;; Beware: Python activation must not call still unbound functions.
      (python . t)
+     (racket . ,(fboundp 'racket-mode))
      ;; MIT/GNU Scheme breaks Babel contrary to Guile, Chez and Chicken Scheme.
      (scheme . ,(fboundp 'geiser-mode))
      (shell . t))
@@ -2226,16 +2227,10 @@ unbind the `org-babel' interface functions when ACTIVE is nil."
 #+name: lst:set-org-link-options
 #+begin_src emacs-lisp -n :results silent
 (with-eval-after-load 'ol
-  ;; I prefer setting `org-link-descriptive' to `nil' over the hook
-  ;; below to make `isearch' bearable when finding matches in links.
-  ;; Setting `org-link-descriptive' to `nil' is a breaking change,
-  ;; since it changes how `org-fill-paragraph' fills.
-  ;; (add-hook 'isearch-mode-hook
-  ;;           (defun unset-org-link-descriptive ()
-  ;;             (when (and (derived-mode-p 'org-mode)
-  ;;                        (bound-and-true-p org-link-descriptive))
-  ;;               (org-toggle-link-display))))
-  (setopt org-link-descriptive nil
+  ;; Setting `org-link-descriptive' to `t' has caused worse `isearch'
+  ;; behavior.  Set `org-link-descriptive' interactively by calling
+  ;; `org-toggle-link-display'.
+  (setopt org-link-descriptive t
           org-link-file-path-type 'relative))
 #+end_src
 
@@ -5325,7 +5320,7 @@ Available versions: 0.2.0, 0.1.1, 0.1.0
   :group 'pip
   :type '(repeat string))
 
-(setopt pip-frozen-packages '("markdown-it-py"))
+(setopt pip-frozen-packages '("markdown-it-py" "mistune"))
 
 ;; Updating "docutils" may require a compatible "Sphinx" release.
 ;; (setopt pip-frozen-packages '("docutils"))
@@ -5706,15 +5701,40 @@ configures =code-cells=.
 *** TODO Look into: editing facilities
 1. [[https://github.com/douglasdavis/numpydoc.el/blob/main/numpydoc.el][Emacs extension to insert numpy style docstrings in function definitions]]
 
+** [[https://racket-lang.org/][Racket Programming]]
+:PROPERTIES:
+:CUSTOM_ID: sec:racket-programming
+:header-args:emacs-lisp: :eval never-export
+:END:
+
+[[https://kchousos.github.io/posts/sicp-in-emacs/][SICP in Emacs]]
+
+#+begin_src emacs-lisp -n
+(when (ensure-package-installation 'racket-mode 'sicp)
+  (unless (package-installed-p 'ob-racket)
+    (package-vc-install
+     '(ob-racket :url "https://github.com/hasu/emacs-ob-racket.git"))))
+#+end_src
+
+#+begin_src racket :lang sicp
+"Hello, world!"
+#+end_src
+
+#+RESULTS:
+: "Hello, world!"
+
 ** [[https://en.wikibooks.org/wiki/Scheme_Programming][Scheme Programming]]
 :PROPERTIES:
 :CUSTOM_ID: sec:scheme-programming
+:header-args:emacs-lisp: :eval never-export
 :END:
 
-Listing [[lst:setup-geiser][Ensure Geiser installation]] supports the [[https://cisco.github.io/ChezScheme/][Chez Scheme]], [[https://call-cc.org/][Chicken Scheme]], and
-[[https://www.gnu.org/software/guile/][GNU Guile]] Scheme implementations and configures Geiser with [[https://cisco.github.io/ChezScheme/][Chez Scheme]] as
-default implementation.  Evaluate one of the following expressions to switch
-between those three implementations:
+Listing [[lst:setup-geiser][Ensure Geiser installation]] supports the Scheme implementations
+1. [[https://cisco.github.io/ChezScheme/][Chez Scheme]],
+2. [[https://call-cc.org/][Chicken Scheme]], and
+3. [[https://www.gnu.org/software/guile/][GNU Guile]] Scheme.
+It configures Geiser with [[https://cisco.github.io/ChezScheme/][Chez Scheme]] as default implementation.  Evaluate one
+of the following expressions to switch between those three implementations:
 1. src_emacs-lisp{(setopt scheme-default-implementation 'chicken)},
 2. src_emacs-lisp{(setopt scheme-default-implementation 'guile)},
 3. src_emacs-lisp{(setopt scheme-default-implementation 'chez)}.
@@ -5920,6 +5940,8 @@ contrary to for instance [[https://github.com/Fanael/rainbow-delimiters#readme][
                   lisp-data-mode-hook
                   lisp-mode-hook
                   python-mode-hook
+                  racket-mode-hook
+                  racket-repl-mode-hook
                   slime-repl-mode-hook
                   sly-mrepl-mode-hook))
     (add-hook hook #'smartparens-strict-mode))