Add missing close(io) to hohqmesh_tutorial.jl

[jlchan]

No description provided.

[ranocha]

This shouldn't be necessary, is it? Everything is inside

open("out/ice_cream_straight_sides.control", "w") do io

so it will close the file correctly after writing to it according to the docs

help?> open
search: open isopen propertynames ComposedFunction CompositeException operm hasproperty getproperty setproperty!

  open(f::Function, args...; kwargs...)

  Apply the function f to the result of open(args...; kwargs...) and close the resulting file descriptor upon
  completion.

  Examples
  ≡≡≡≡≡≡≡≡≡≡

  julia> write("myfile.txt", "Hello world!");
  
  julia> open(io->read(io, String), "myfile.txt")
  "Hello world!"
  
  julia> rm("myfile.txt")

[jlchan]

Hm, that's odd. @MarkLopat and i were noticing that the control file was being unexpectedly changed when written. I assumed it was due to the close statement but looks like I was wrong.

@MarkLopat can you recheck using a restarted REPL that you still see those weird changes to the control file when running this command?

[jlchan]

Closing since the issue appears to be unrelated to close(io)