Issue 2376: Automatic footnotes on \null markups causes unexpected results (issue 5755058)

[mtsolo]

http://codereview.appspot.com/5755058/diff/1/lily/page-breaking.cc
File lily/page-breaking.cc (right):

http://codereview.appspot.com/5755058/diff/1/lily/page-breaking.cc#newcode584
lily/page-breaking.cc:584: }
Just a C++ question - do these lines implicitly call the copy
constructor to create footnote_stencil so that footnote_stencil is a
copy of foot?  I'm not familiar with this syntax for copying, so I just
wanted to be sure that this is what these lines were doing.

http://codereview.appspot.com/5755058/