fix docstring

Author: ilupin

bibtex-actions.el

@@ -577,7 +577,7 @@ With prefix, rebuild the cache before offering candidates."
 (defun bibtex-actions-at-point (&optional arg)
   "Run actions on citation keys found at point.
 If no citation key is found, target entries can be chosen from a
-list of candidates. With prefix ARG, rebuild the cache before
+list of candidates.  With prefix ARG, rebuild the cache before
 offering candidates."
   (interactive "P")
   (if-let ((keys (bibtex-actions-citation-key-at-point)))