CodeGenerator

I didn't notice that 4107 is a ST4 build. Nevertheless didn't find the way to fix it.

For me it seems that `fancy_outline` works well: ``` ╒════════════════════════════════════════╤═══════════════════════════════════════════════════╤════════════╕ │ Header#1 │ Header#2 │ Header#3 │ ╞════════════════════════════════════════╪═══════════════════════════════════════════════════╪════════════╡ │ Alpha beta gama zeta omega │ The weather was exceptionally good...

Fixed `github` format https://github.com/astanin/python-tabulate/pull/366