Update docstring in lily/note-head-line-engraver.cc (issue 194900043 by address@hidden)

[david . nalesnik]

Reviewers: ,

Message:
Please review.

Description:
Update docstring in lily/note-head-line-engraver.cc

As of commit 06dbc712c654888708b9feabbd0affe9ff2e4902
(May 27, 2003), this file is not involved in the creation
of Glissando grobs.

Please review this at https://codereview.appspot.com/194900043/

Affected files (+2, -4 lines):
  M lily/note-head-line-engraver.cc


Index: lily/note-head-line-engraver.cc
diff --git a/lily/note-head-line-engraver.cc  
b/lily/note-head-line-engraver.cc
index  
046a26423126567b9bfcd33e7979e49f8f1276ba..f9a6c91b2c690195188b5a0813fad2d98e98d137  
100644
--- a/lily/note-head-line-engraver.cc
+++ b/lily/note-head-line-engraver.cc
@@ -113,12 +113,10 @@ Note_head_line_engraver::stop_translation_timestep ()
 ADD_ACKNOWLEDGER (Note_head_line_engraver, rhythmic_head);
 ADD_TRANSLATOR (Note_head_line_engraver,
                 /* doc */
-                "Engrave a line between two note heads, for example a"
-                " glissando.  If @code{followVoice} is set, staff switches"
-                " also generate a line.",
+                "Engrave a line between two note heads in a staff"
+                " switch if @code{followVoice} is set.",

                 /* create */
-                "Glissando "
                 "VoiceFollower ",

                 /* read */