[0pt] Inline code in Lua-generated docs is parsed in different ways

[patiencedaur]

What needs to be done

Some of the documentation (like Cartridge) is generated from Lua files. Looks like entities in single backticks are sometimes parsed as cursive and other times as inline code. They should be always parsed as inline code.

Here is an illustration. Both ".yaml" and the parts formatted in cursive are framed by single backticks in the source, https://github.com/tarantool/cartridge/blob/master/cartridge/argparse.lua:

Reviewer: @ patiencedaur