[nongnu] elpa/helm 682277c143 1/5: Add comment

[ELPA Syncer]

branch: elpa/helm
commit 682277c14347d6269ad4dcecafb8255a8479fc4c
Author: Thierry Volpiatto <thievol@posteo.net>
Commit: Thierry Volpiatto <thievol@posteo.net>

    Add comment
---
 helm-lib.el | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/helm-lib.el b/helm-lib.el
index 3e6d6ffd3d..7970a5c72b 100644
--- a/helm-lib.el
+++ b/helm-lib.el
@@ -1277,6 +1277,9 @@ TYPE when nil specify function, for other values see
                        ((defvar defface)
                         (or (symbol-file sym it)
                             (help-C-file-name sym 'var)))
+                       ;; Sometimes e.g. with prefix key symbols
+                       ;; `find-function-library' returns a list of only one
+                       ;; element, the symbol itself i.e. no library.
                        (t (cdr (find-function-library sym)))))
          (library (and symbol-lib
                        (find-library-name