el/dot-emacs (mdw-fontify-rust): Defeat doc-comment highlighting properly.

I don't want to highlight documentation comments differently from
ordinary comments.  I noticed, back in 77ccc2aa..., that this was done
using `font-lock-syntactic-face-function, and decided to force that to
`nil'.  I was right about the cause, but so wrong about the solution.

If the variable is `nil', then you just get errors about trying to apply
`nil'.  There is a default value, which selects `string' or `comment'
based on the `parse-partial-sexp' state, but for some stupid reason this
default is just a lambda expression in the `defvar' form rather than
having a name like `font-lock-default-syntactic-face-function' or
something.

Override the Rust-mode choice with the default (which isn't doing
anything other than the doc-comment highlighting behaviour that I don't
want) with the default.

diff --git a/el/dot-emacs.el b/el/dot-emacs.el
index fddcf78e3530de243737e63d426d639128a48def..911226b4513df7fae6d540285e350c095563325e 100644 (file)
--- a/el/dot-emacs.el
+++ b/el/dot-emacs.el
@@ -3389,7 +3389,8 @@ (defun mdw-fontify-rust ()
             ;; And anything else is punctuation.
             (list "\\(\\s.\\|\\s(\\|\\s)\\|\\s\\\\|\\s/\\)"
                   '(0 mdw-punct-face)))
             ;; And anything else is punctuation.
             (list "\\(\\s.\\|\\s(\\|\\s)\\|\\s\\\\|\\s/\\)"
                   '(0 mdw-punct-face)))

-           font-lock-syntactic-face-function nil))
+         font-lock-syntactic-face-function
+           (default-value 'font-lock-syntactic-face-function)))

 
   ;; Hack key bindings.
   (local-set-key [?{] 'mdw-self-insert-and-indent)
 
   ;; Hack key bindings.
   (local-set-key [?{] 'mdw-self-insert-and-indent)