[elpa] externals/denote 3775a61028: Allow nil :front-matter in denote-file-types

[ELPA Syncer]

branch: externals/denote
commit 3775a61028c4e12530392018428b95279aabcabf
Author: Protesilaos Stavrou <info@protesilaos.com>
Commit: Protesilaos Stavrou <info@protesilaos.com>

    Allow nil :front-matter in denote-file-types
    
    The 'denote-file-types' is, for the time being, specified as a
    'defvar' for advanced users.  We do eventually want to turn it into a
    defcustom, assuming there is a need for it (we will figure it out
    through further testing).
    
    This change allows the ':front-matter' property to accept a nil value,
    which we internally read as an empty string.
    
    Thanks to Noboru Ota (nobiot) for pointing this out on the mailing list:
    <https://lists.sr.ht/~protesilaos/denote/%3C86k05gsqsg.fsf%40nobiot.com%3E>.
---
 denote.el | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/denote.el b/denote.el
index 33c5bd67ef..97cf276e6a 100644
--- a/denote.el
+++ b/denote.el
@@ -1159,9 +1159,10 @@ Apply `downcase' to KEYWORDS."
 TITLE, DATE, KEYWORDS, FILENAME, ID are all strings which are
 provided by `denote'.  FILETYPE is one of the values of
 `denote-file-type'."
-  (let ((title (denote--format-front-matter-title title filetype))
-        (kws (denote--format-front-matter-keywords keywords filetype)))
-    (format (denote--front-matter filetype) title date kws id)))
+  (let* ((fm (denote--front-matter filetype))
+         (title (denote--format-front-matter-title title filetype))
+         (kws (denote--format-front-matter-keywords keywords filetype)))
+    (if fm (format fm title date kws id) "")))
 
 (defun denote--path (title keywords dir id file-type)
   "Return path to new file with ID, TITLE, KEYWORDS and FILE-TYPE in DIR."