horizontal bracket over a single note

[Matthew]

Is it possible to produce a horizontal bracket over a single note? (currently on
v. 2.10.33)

I've tried playing with OttavaBracket and TextSpanner.

TextSpanner doesn't work for a single note:
{
  c4\startTextSpan\stopTextSpan
}

I can't get the left edge for the ottava bracket to work. I want there to be a
left edge, identical to the right.
{
  #(set-octavation 1)
  \set Staff.ottavation = #""
  \override Staff.OttavaBracket #'stencil = #ly:ottava-bracket::print
%left edge doesn't work
  \override Staff.OttavaBracket #'edge-height = #'(1.2 . 1.2)
  \override Staff.OttavaBracket #'bracket-flare = #'(0 . 0)
  \override Staff.OttavaBracket #'dash-period = #1.0    
%left shorten does work
  \override Staff.OttavaBracket #'shorten-pair  = #'(-0.6 . -0.6) 
  \override Staff.OttavaBracket #'staff-padding = #3.0
  \override Staff.OttavaBracket #'minimum-length  = #1.0  
  c'4
  #(set-octavation 0)
}


Thanks