gnu: emacs-helpful: Update to 0.21.

* gnu/packages/emacs-xyz.scm (emacs-helpful): Update to 0.21.

Signed-off-by: Hilton Chain <hako@ultrarare.space>

gnu/packages/emacs-xyz.scm

@@ -24410,20 +24410,18 @@ downloading manager for Emacs.")
       (license license:gpl3+))))
 
 (define-public emacs-helpful
-  (let ((commit "1c98f6f06a85def5d34c735f8cd407f20cebddf9")
-        (revision "1"))
   (package
     (name "emacs-helpful")
-      (version (git-version "0.19" revision commit))
+    (version "0.21")
     (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url "https://github.com/Wilfred/helpful")
-               (commit commit)))
+             (commit version)))
        (file-name (git-file-name name version))
        (sha256
-          (base32 "18b5hjfji51zxjrxhkklxx3j9svk295awmxv8n95mp8ilas2kd3l"))))
+        (base32 "03afgdbs5nmhw833svrqky7fmfs1zlvqzcj7j5g29sakivs60xqc"))))
     (build-system emacs-build-system)
     (propagated-inputs
      (list emacs-dash emacs-elisp-refs emacs-f emacs-s))
@@ -24453,7 +24451,7 @@ functions.
 @item Trace, disassemble functions from inside Helpful.  This is discoverable
 and doesn't require memorisation of commands.
 @end itemize\n")
-      (license license:gpl3+))))
+    (license license:gpl3+)))
 
 (define-public emacs-logview
   (package