Add hydra config for git-gutter.

configs/init-functions.el

@@ -58,5 +58,13 @@ Saves to a temp file and puts the filename in the kill ring."
 ;; Borrar espacios, tabs y saltos de línea innecesarios al guardar
 (add-hook 'before-save-hook 'delete-trailing-whitespace)
 
+;; Mostrar y ocultar el diff de la línea de git-gutter
+(defun git-gutter:toggle-popup-hunk ()
+  "Toggle 'git-gutter' hunk window."
+  (interactive)
+  (if (and (get-buffer "*git-gutter:diff*") (window-live-p (git-gutter:popup-buffer-window)))
+      (delete-window (git-gutter:popup-buffer-window))
+    (git-gutter:popup-hunk)))
+
 (provide 'init-functions)
 ;;; init-functions.el ends here.