Get rid of Fennel programming

README.org

@@ -376,6 +376,8 @@ the contents of packages and allows to update packages to the latest version.
 #+begin_src emacs-lisp -n :results silent
 (when (require 'treesit nil 'noerror)
   (setopt
+   ;; Set `tab-width' in `after-change-major-mode-hook' function too.
+   go-ts-mode-indent-offset 2
    treesit-language-source-alist
    '((bash "https://github.com/tree-sitter/tree-sitter-bash" "master" "src")
      (c "https://github.com/tree-sitter/tree-sitter-c" "master" "src")
@@ -383,7 +385,9 @@ the contents of packages and allows to update packages to the latest version.
      (cpp "https://github.com/tree-sitter/tree-sitter-cpp" "master" "src")
      (css "https://github.com/tree-sitter/tree-sitter-css" "master" "src")
      (glsl "https://github.com/theHamsta/tree-sitter-glsl" "master" "src")
+     ;; go-ts-mode requires libtree-sitter-go and libtree-sitter-gomode.
      (go "https://github.com/tree-sitter/tree-sitter-go" "master" "src")
+     (gomod "https://github.com/camdencheek/tree-sitter-go-mod" "main" "src")
      (html "https://github.com/tree-sitter/tree-sitter-html" "master" "src")
      (java "https://github.com/tree-sitter/tree-sitter-java" "master" "src")
      (javascript "https://github.com/tree-sitter/tree-sitter-javascript"
@@ -405,8 +409,11 @@ the contents of packages and allows to update packages to the latest version.
                  "master" "typescript/src")
      (yaml "https://github.com/ikatyang/tree-sitter-yaml" "master" "src")))
 
-  (add-to-list 'auto-mode-alist
-               `(,(rx ".py" (opt (any "iw")) eos) . python-ts-mode)))
+  (add-hook 'after-change-major-mode-hook
+            (defun on-go-ts-mode-hook ()
+              (when (derived-mode-p 'go-ts-mode 'go-mod-ts-mode)
+                (setq-local tab-width 2))))
+  (add-to-list 'auto-mode-alist `(,(rx ".go" eos) . go-ts-mode)))
 #+end_src
 
 * [[info:emacs#Faces][Text faces or styles (info)]]
@@ -4096,7 +4103,7 @@ Listing [[lst:sbcl-core-for-sly]] tangles to a script to dump such a [[http://ww
 #+caption[Configure =slime=]:
 #+caption: Configure =slime=.
 #+name: lst:configure-slime
-#+begin_src emacs-lisp -n :results silent
+#+begin_src emacs-lisp -n :results silent :tangle no
 (when (ensure-package-installation 'slime)
   (with-eval-after-load 'slime
     (setq slime-default-lisp 'sbcl
@@ -4728,49 +4735,6 @@ byte code:
 13      return
 #+end_src
 
-** [[https://fennel-lang.org/][Fennel Programming]]
-:PROPERTIES:
-:CUSTOM_ID: sec:fennel-programming
-:END:
-
-Here is a list of links describing how to install and setup [[https://fennel-lang.org/][Fennel]] and how to
-install and use [[https://gitlab.com/andreyorst/ob-fennel][ob-fennel]] with the [[https://love2d.org/][LÖVE 2D game engine]]:
-1. [[https://fennel-lang.org/][The Fennel Programming Language]]
-2. [[https://fennel-lang.org/setup][Setting up Fennel]]
-3. [[https://gitlab.com/andreyorst/ob-fennel][Org Babel support for the Fennel language: ob-fennel]]
-4. [[https://andreyorst.gitlab.io/posts/2022-09-26-reproducible-research-with-org-mode-fennel-and-love/][Reproducible Research with Org Mode, Fennel, and LÖVE]]
-
-#+caption[Install =fennel-mode= and =ob-fennel= when =fennel= is an executable]:
-#+caption: Install =fennel-mode= and =ob-fennel= when =fennel= is an executable.
-#+name: lst:install-ob-fennel-mode
-#+begin_src emacs-lisp -n :results silent
-(when (and (executable-find "fennel")
-           (ensure-package-installation 'fennel-mode))
-  (unless (package-installed-p 'ob-fennel)
-    (package-vc-install "https://gitlab.com/andreyorst/ob-fennel"))
-  (when (package-installed-p 'ob-fennel)
-    (ensure-package-installation 'ob-fennel)
-    (set-org-babel-language-activity 'fennel (fboundp 'fennel-mode))))
-#+end_src
-
-#+caption[Fennel example]:
-#+caption: Fennel example.
-#+header: :var x=10 y=20
-#+name: lst:fennel-example
-#+begin_src fennel -n :eval never-export :results silent :session fennel
-(+ x y)
-#+end_src
-
-#+caption[Install =Fennel= with luarocks on Darwin]:
-#+caption: Install =Fennel= with luarocks on Darwin.
-#+name: lst:install-fennel-on-darwin
-#+begin_src shell -n :eval never :results silent :tangle no
-luarocks \
-    install --local readline \
-    HISTORY_INCDIR=/usr/local/opt/readline/include \
-    HISTORY_DIR=/usr/local/opt/readline/lib
-#+end_src
-
 ** [[https://en.wikibooks.org/wiki/Scheme_Programming][Scheme Programming]]
 :PROPERTIES:
 :CUSTOM_ID: sec:scheme-programming