lang/web: more sensible html-tidy formatter config

+ No longer inserts html/body tags unless they're detected in the buffer
+ Respect tab-width and indent-tab-mode
+ Don't auto-remove empty elements

modules/lang/web/+html.el

@@ -17,6 +17,18 @@
   :config
   (set-docsets! 'web-mode "HTML" "Twig" "WordPress")
 
+  ;; tidy is already defined by the format-all package. We redefine it to add
+  ;; more sensible arguments to the tidy command.
+  (set-formatter! 'html-tidy
+    '("tidy" "-q" "-indent"
+      "--tidy-mark" "no"
+      "--drop-empty-elements" "no"
+      "--show-body-only" "auto"
+      ("--indent-spaces" "%d" tab-width)
+      ("--indent-with-tabs" "%s" (if indent-tabs-mode "yes" "no"))
+      ("-xml" (memq major-mode '(nxml-mode xml-mode))))
+    :ok-statuses '(0 1))
+
   (setq web-mode-enable-html-entities-fontification t
         web-mode-auto-close-style 2)