tools/flyspell: add +everywhere feature

docs/index.org

@@ -235,7 +235,7 @@ Small modules that give Emacs access to external tools & services.
 + [[file:../modules/tools/ein/README.org][ein]] - TODO
 + [[file:../modules/tools/eval/README.org][eval]] =+overlay= - REPL & code evaluation support for a variety of languages
 + flycheck - Live error/warning highlights
-+ flyspell - Spell checking
++ flyspell =+everywhere= - Spell checking
 + gist - TODO
 + [[file:../modules/tools/lookup/README.org][lookup]] =+dictionary +docsets= - Universal jump-to & documentation lookup
   backend

modules/tools/flyspell/config.el

@@ -50,8 +50,9 @@
         flyspell-issue-message-flag nil)
 
   (add-hook 'text-mode-hook #'flyspell-mode)
-  (when (featurep! +prog)
-    (add-hook 'prog-mode-hook #'flyspell-prog-mode))
+  (when (featurep! +everywhere)
+    (add-hook! '(conf-mode-hook prog-mode-hook)
+               #'flyspell-prog-mode))
 
   (add-hook! 'flyspell-mode-hook
     (defun +flyspell-inhibit-duplicate-detection-maybe-h ()