[fish] Fix help command on Windows.

dot_config/emacs/init.el

@@ -428,3 +428,6 @@ Return the list updated."
   :hook ((sh-mode) . (lambda () (setq indent-tabs-mode nil)))
   :config
   (setq sh-basic-offset 2))
+
+;;; Fish.
+(use-package fish-mode)

dot_config/private_fish/aliases.fish

@@ -0,0 +1,3 @@
+if test $CHEZMOI_OS = 'windows'
+    alias help="$BROWSER (cygpath -w '/usr/share/doc/fish/index.html')"
+end

dot_config/private_fish/config.fish

@@ -1,6 +1,11 @@
+set FISH_CONFIG_HOME $XDG_CONFIG_HOME'/fish'
+
 if status is-interactive
     source $XDG_CONFIG_HOME/sh/aliases.sh
+    source $FISH_CONFIG_HOME'/aliases.fish'
 
     alias spu='sudo-pacman-update'
     fish_vi_key_bindings
 end
+
+set --erase FISH_CONFIG_HOME

dot_config/sh/profile.sh

@@ -77,6 +77,7 @@ fi
 # Paths.
 if [ "$CHEZMOI_OS" = 'windows' ]; then
   PYTHON_VERSION=310
+  insert_path '/c/Program Files/Mozilla Firefox'
   insert_path '/mingw64/bin'
   insert_man '/mingw64/share/man'
   insert_path '/c/Program Files/Python'${PYTHON_VERSION}