Global variables example in overview.nelua

[stefanos82]

In overview.nelua we have the following code:

print '### Global symbol'
  global global_a = 1
  global function global_f()
    return 'f'
  end
  -- require 'globals'
  print(global_a) -- outputs: 1
  print(global_f()) -- outputs: f

@edubart do you think it could make more sense to enclose both print()s inside a do end block, so we can make it more obvious that global variables can be accessed from within a local block?

print '### Global symbol'
  global global_a = 1
  global function global_f()
    return 'f'
  end
  -- require 'globals'
do  
  print(global_a) -- outputs: 1
  print(global_f()) -- outputs: f
end