Improve and add doc-strings

* lisp/epa-file.el (epa-file-select-keys):
lisp/epa-hook.el (epa-file-name-regexp):
lisp/epa.el (epa-exit-buffer): Improve doc-string.
* lisp/epa-hook.el (epa-file-name-regexp-update): Add doc-string.

1 files changed, 7 insertions, 4 deletions

diff --git a/lisp/epa-hook.el b/lisp/epa-hook.el
index d424e7a9faf..a86f23eb688 100644
--- a/lisp/epa-hook.el
+++ b/lisp/epa-hook.el
@@ -35,10 +35,10 @@
 (defcustom epa-file-name-regexp (purecopy "\\.gpg\\(~\\|\\.~[0-9]+~\\)?\\'")
   "Regexp which matches filenames to be encrypted with GnuPG.
 
-If you set this outside Custom while epa-file is already enabled, you
-have to call `epa-file-name-regexp-update' after setting it to
-properly update file-name-handler-alist.  Setting this through Custom
-does that automatically."
+If you set this outside Custom while epa-file is already enabled,
+you have to call `epa-file-name-regexp-update' after setting it
+to properly update `file-name-handler-alist'.  Setting this
+through Custom does that automatically."
   :type 'regexp
   :group 'epa-file
   :set 'epa-file--file-name-regexp-set)
@@ -72,6 +72,9 @@ May either be a string or a list of strings.")
   (list epa-file-name-regexp nil 'epa-file))
 
 (defun epa-file-name-regexp-update ()
+  "Update `file-name-handler-alist' after configuring outside Custom.
+After setting `epa-file-name-regexp-update' outside the Custom
+interface, update `file-name-handler-alist'."
   (interactive)
   (unless (equal (car epa-file-handler) epa-file-name-regexp)
     (setcar epa-file-handler epa-file-name-regexp)))