cobra

GenMarkdownTreeCustom has a way to a header (filePrepender arg), however there is not a first class way to add a footer.

Hello maintainers of the amazing package,

I recently updated cobrapy and am experienced unexpected behavior with cobra.test.create_test_model("salmonella")

Two things are unusual:

1. Now, many warnings are given during loading of the model, whereas none were given in a previous version. Here are a few of the warnings:

`Model does not contain SBML fbc package information.
SBML package

• The format in which metrics are exported by grofer export resembles the ndjson format.
  • This is done for ease of appending json objects to a file without having to buffer large json strings in memory.
  • It also makes it easier to read the file in efficient ways such as by maybe lazy loading using generators in python.
• It'd be helpful to have this men