Make arguments like Context.GrobName accessible as symbol lists

Documentation/snippets/aligning-objects-created-with-the--mark-command.ly

 %% DO NOT EDIT this file manually; it is automatically
 %% generated from LSR http://lsr.dsi.unimi.it
 %% Make any changes in LSR itself, or in Documentation/snippets/new/ ,
 %% and then run scripts/auxiliar/makelsr.py
 %%
 %% This file is in the public domain.
-\version "2.16.0"
+\version "2.17.6"
 
 \header {
   lsrtags = "text"
 
   texidoc = "
 By default the @code{\\mark} command centers objects over a bar line.
 This behavior can be modified to align at right or left.
 
 "
   doctitle = "Aligning objects created with the \\mark command"
 } % begin verbatim
 
 
 \relative c' {
   c1 \mark "(Center)"
   c1
-  \once \override Score.RehearsalMark #'self-alignment-X = #LEFT
+  \once \override Score.RehearsalMark.self-alignment-X = #LEFT
   \mark "(Left)"
   c4 c c c
   c4 c c c
-  \once \override Score.RehearsalMark #'self-alignment-X = #RIGHT
+  \once \override Score.RehearsalMark.self-alignment-X = #RIGHT
   \mark "(Right)"
   c1
 }