[elpa] externals/denote d02915aaf2 19/22: Clarify 'denote-retrieve-filename-signature' doc string

[ELPA Syncer]

branch: externals/denote
commit d02915aaf22944276c90fb11d3e34eaed71100cf
Author: Protesilaos Stavrou <info@protesilaos.com>
Commit: Protesilaos Stavrou <info@protesilaos.com>

    Clarify 'denote-retrieve-filename-signature' doc string
---
 denote.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/denote.el b/denote.el
index 6260195abd..9573540c36 100644
--- a/denote.el
+++ b/denote.el
@@ -1272,7 +1272,7 @@ To only return an existing identifier, refer to the 
function
   "1.0.0")
 
 (defun denote-retrieve-filename-signature (file)
-  "Extract signature from FILE name."
+  "Extract signature from FILE name, if present, else return nil."
   (when (denote-file-has-signature-p file)
     (string-match denote-signature-regexp file)
     (match-string 1 file)))