rust-mode: tag -> enum. Closes #1577

Author: brson

src/etc/emacs/rust-mode.el

@@ -52,7 +52,7 @@
 (defvar rust-punc-chars "()[].,{}:;")
 (defvar rust-value-keywords
   (let ((table (make-hash-table :test 'equal)))
-    (dolist (word '("mod" "type" "resource" "fn" "tag" "iface" "impl"))
+    (dolist (word '("mod" "type" "resource" "fn" "enum" "iface" "impl"))
       (puthash word 'def table))
     (dolist (word '("if" "else" "while" "do" "for" "break" "cont" "ret" "be" "fail" "const"
                     "check" "assert" "claim" "prove" "native" "import" "export" "let" "log"