\version "2.17.28"

% test of new grace auto-beamer

% simple #OK
{ \grace { c'8 d' } e'4 
 \grace c'8 e'}

% acciaccatura #OK
{ \acciaccatura { c'8 d' } e'4 }

% appoggiatura #OK
{ \appoggiatura { c'8 d' } e'4 }

% slashed grace #OK
{ \slashedGrace { c'8 d' } e'4 }

% after grace #OK
{  \new Voice { \afterGrace e'4 { c'8 d' } } }

% keep the beaming (in my opinion) #OK
{ \grace { c'16 d' e' f' e' f' g' \fermata a'8 g' a' } g'4 }
  
% this could be the notation of previous ex. w. split beaming in my opinion
{ 
  \new Voice {
  \grace { c'16 d' e' f' e' f' g' \fermata } \grace { a'8 g' a'  } g'4 
  }
}
% 27:55: warning: adding note head to incompatible stem (type = 1/16)
%   \grace { c'16 d' e' f' e' f' g' \fermata } \grace { 
%                                                       a'8 g' a'  } g'4 
% 27:55: warning: maybe input should specify polyphonic voices
%   \grace { c'16 d' e' f' e' f' g' \fermata } \grace { 
%                                                       a'8 g' a'  } g'4