Make arguments like Context.GrobName accessible as symbol lists

Documentation/notation/chords.itely

 @c -*- coding: utf-8; mode: texinfo; -*-
 @ignore
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     version that you are working on.  For details, see the Contributors'
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 @end ignore
 
-@c \version "2.17.5"
+@c \version "2.17.6"
 
 
 @node Chord notation
 @section Chord notation
 
 @lilypondfile[quote]{chords-headword.ly}
 
 Chords can be entered either as normal notes or in chord mode and displayed
 using a variety of traditional European chord naming conventions.  Chord
 names and figured bass notation can also be displayed.
@@ skipping 140 matching lines @@
 @tab
 @b{Example}
 
 @item
 None
 @tab
 The default action; produces a major triad.
 @tab
 @lilypond[line-width=4\cm, noragged-right]
 \chordmode {
-  \override Staff.TimeSignature stencil = ##f
+  \override Staff.TimeSignature.stencil = ##f
   c1
 }
 @end lilypond
 
 @item
 m, m7
 @tab
 The minor chord.  This modifier lowers the 3rd.
 @tab
 @lilypond[line-width=4\cm, noragged-right]
 \chordmode {
-  \override Staff.TimeSignature stencil = ##f
+  \override Staff.TimeSignature.stencil = ##f
   c1:m c:m7
 }
 @end lilypond
 
 
 @item
 dim, dim7
 @tab
 The diminished chord.  This modifier lowers the 3rd, 5th and (if
 present) the 7th step.
 @tab
 @lilypond[line-width=4\cm, noragged-right]
 \chordmode {
-  \override Staff.TimeSignature stencil = ##f
+  \override Staff.TimeSignature.stencil = ##f
   c1:dim c:dim7
 }
 @end lilypond
 
 @item
 aug
 @tab
 The augmented chord.  This modifier raises the 5th step.
 @tab
 @lilypond[line-width=4\cm, noragged-right]
 \chordmode {
-  \override Staff.TimeSignature stencil = ##f
+  \override Staff.TimeSignature.stencil = ##f
   c1:aug
 }
 @end lilypond
 
 @item
 maj, maj7
 @tab
 The major 7th chord.  This modifier adds a raised 7th step.  The
 @code{7} following @code{maj} is optional.  Do NOT use this modifier
 to create a major triad.
 @tab
 @lilypond[line-width=4\cm, noragged-right]
 \chordmode {
-  \override Staff.TimeSignature stencil = ##f
+  \override Staff.TimeSignature.stencil = ##f
   c1:maj c:maj7
 }
 @end lilypond
 
 @end multitable
 
 @seealso
 Notation Reference:
 @ref{Common chord modifiers},
 @ref{Extended and altered chords}.
@@ skipping 949 matching lines @@
 <<
   { fis4 g g, e' }
   \figures {
     <6 5>4 <5 4>
     \bassFigureExtendersOn
     < 5 _!>4 <6>
     \bassFigureExtendersOff
   }
 >>
 @end lilypond