Update docstrings

bundle/bundle--linux.el

@@ -203,7 +203,15 @@ Takes OPTION as an argument and prints its description."
   (or (cdr (assoc alias mk/remote/*host-aliases*)) alias))
 
 (defun mk/remote/--systemctl-service (alias service command)
-  "Start a systemd SERVICE on a remote HOST."
+  "Execute a systemctl COMMAND on a systemd SERVICE on a remote host identified by ALIAS.
+
+ALIAS is a string that specifies the remote host; it can be an
+alias defined in `mk/remote/*host-aliases*'.
+
+SERVICE is the name of the systemd service to operate on.
+
+COMMAND is the systemctl command to execute on the service (e.g.,
+'start', 'stop', 'status')."
   (let* ((host (mk/remote/--get-real-host alias))
          (buffer (generate-new-buffer (format "*%s-%s-%s*" alias service command)))
          (process-name (format "systemctl-%s-%s" command service))
@@ -217,6 +225,12 @@ Takes OPTION as an argument and prints its description."
      :sentinel sentinel)))
 
 (defmacro mk/remote/define-systemctl-functions (&rest actions)
+  "Dynamically create functions to interact with systemd services on a remote host.
+
+Each function will be named `mk/remote/ACTION-service', where
+ACTION is one of the symbols in ACTIONS. The functions will take
+an ALIAS and SERVICE as arguments and call
+`mk/remote/--systemctl-service' accordingly."
   `(progn
      ,@(mapcar
         (lambda (action)