Make arguments like Context.GrobName accessible as symbol lists

Documentation/snippets/setting-hairpin-behavior-at-bar-lines.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 "2.17.5"
+\version "2.17.6"
 
 \header {
   lsrtags = "expressive-marks, tweaks-and-overrides"
 
   texidoc = "
 If the note which ends a hairpin falls on a downbeat, the hairpin stops
 at the bar line immediately preceding.  This behavior can be controlled
 by overriding the @code{'to-barline} property.
 
 "
   doctitle = "Setting hairpin behavior at bar lines"
 } % begin verbatim
 
 
 \relative c'' {
   e4\< e2.
   e1\!
-  \override Hairpin to-barline = ##f
+  \override Hairpin.to-barline = ##f
   e4\< e2.
   e1\!
 }