add triplet parser to file parsers

Author: bdarcus

citar-file.el

@@ -50,7 +50,8 @@
   :type '(boolean))
 
 (defcustom citar-file-parser-functions
-  '(citar-file-parser-default)
+  '(citar-file-parser-default
+    citar-file-parser-triplet)
   "List of functions to parse file field."
   :group 'citar
   :type '(repeat function))

citar.el

@@ -463,7 +463,7 @@ key associated with each one."
               (notes
                (when (citar-file--files-for-entry
                       citekey
-                      nil ; don't want to check file file
+                      nil ; don't want to check file field
                       citar-notes-paths
                       citar-file-extensions)
                  " has:notes"))