Include graphics objects with hidden handles in axes limit calculation (bug #63095). * libinterp/corefcn/graphics.cc (get_children_limits): Get handles to all axes children including those with hidden handle visibility. Add BIST. * libinterp/corefcn/graphics.in.h (text::update_position): Do not automatically change "zliminclude" property. Axes labels are implemented as text objects, and we don't want their extent to be included in the axis limit calculation.

% Code only with a very very very very very very very very very very looong line
%
x = 5;

for i = 1:5
  x += i;  # Might be useful "perhaps"
endfor

%{
Multiline comment with keyword if "if" and 'if'
%}

if (x == 'a')
  y = sin (x);
endif

#{
Multiline comment with keyword if "if" and 'if'
#}

str = "some % string \" ' with %{";
str2 = 'another % string '' " with %{';
%