* gnu/packages/patches/emacs-helpful-docstring-test.patch: New file.
* gnu/packages/emacs-xyz.scm (emacs-helpful): Update to 0.19.
[source]: Use the patch.
* gnu/local.mk (dist_patch_DATA): Register the patch.
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>