refactor(docs): replace nav menus with virtual one

Now that the header is dynamically generated (when doom-docs-mode is
active), a literal header is unnecessary.

modules/editor/evil/README.org

@@ -1,5 +1,3 @@
-← [[doom-module-index:][Back to module index]]               ! [[doom-module-issues:::editor evil][Issues]]  ↖ [[doom-repo:tree/develop/modules/editor/evil/][Github]]  ± [[doom-suggest-edit:][Suggest edits]]  ? [[doom-help-modules:][Help]]
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 #+title:    :editor evil
 #+subtitle: The text editor Emacs was missing
 #+created:  April 08, 2020
@@ -202,6 +200,27 @@ If you prefer the old behavior, it can be reversed with:
 Evil-specific configuration and keybindings (defined with ~map!~) will be
 ignored without [[doom-module:][:editor evil]] present (and omitted when byte-compiling).
 
+** Include underscores in evil word motions?
+A more in-depth answer and explanation for this can be found [[https://evil.readthedocs.io/en/latest/faq.html#underscore-is-not-a-word-character][in Evil's
+documentation]].
+
+TL;DR If you want the underscore to be recognized as word character, you can
+modify its entry in the syntax-table:
+#+begin_src emacs-lisp
+(modify-syntax-entry ?_ "w")
+#+end_src
+
+This gives the underscore the word syntax-class. You can use a mode-hook to
+modify the syntax-table in all buffers of some mode, e.g.
+#+begin_src emacs-lisp
+;; For python
+(add-hook! 'python-mode-hook (modify-syntax-entry ?_ "w"))
+;; For ruby
+(add-hook! 'ruby-mode-hook (modify-syntax-entry ?_ "w"))
+;; For Javascript
+(add-hook! 'js2-mode-hook (modify-syntax-entry ?_ "w"))
+#+end_src
+
 * TODO Appendix
 #+begin_quote
  🔨 This module has no appendix yet. [[doom-contrib-module:][Write one?]]