[bug] bad size of piano brace

[Juergen Reuter]

Hi,

in the online manual, Sect. 14.1 ("An example of a musicological 
document"), in the "screech and boink" example, the piano brace is too 
small.  At least, I can not see in the .ly source any reason why the brace 
should be printed smaller.

See:

http://lilypond.org/doc/v2.9/Documentation/user/lilypond/An-example-of-a-musicological-document.html#An-example-of-a-musicological-document

Greetings,
Juergen