Add docstring for ennum-intern.

* ennum.el (ennum-intern): Add docstring.

1 files changed, 4 insertions, 0 deletions

diff --git a/ennum.el b/ennum.el
index d32ca75..1526e48 100644
--- a/ennum.el
+++ b/ennum.el
@@ -182,6 +182,10 @@ value of the last form in BODY."
 ;; changes? Yes, since we ask for an absolute working directory, we
 ;; should.
 (defun ennum-intern (filename)
+  "Intern FILENAME into the store.
+
+FILENAME must be an absolute path or a path relative to the working
+directory of the blog."
   (let* ((canonical-file-path
           (expand-file-name filename
                             (ennum-setting :working-directory)))