Wrong markdown rendering when showing method documentation

[baco]

When displaying documentation of a method, the signature gets interpreted as Markdown instead of being treated as a code snippet. As seen in the first screenshot foo(*args, **kwargs) is treated as if the intention was to make bold text using the * character around words

My testing minimal init.vim

" nvim-lspconfig
lua require('lspconfig').pyls.setup{}

" completion-nvim
autocmd FileType python lua require('completion').on_attach()
let g:completion_matching_strategy_list = ['exact', 'substring', 'fuzzy']
let g:completion_matching_ignore_case = 1  " not v:true, 1. ¯\_(ツ)_/¯
let g:completion_matching_smart_case = 1  " not v:true, 1. ¯\_(ツ)_/¯
let g:completion_trigger_on_delete = 1  " not v:true, 1. ¯\_(ツ)_/¯

How to reproduce

• Start writing a method's name, for instance br for break or breakpoint() in Python
• Navigate through the options to get method's documentation expanded on the right of the completion list
• The following floating window is shown. Syntax highlighting is wrong, as if the star character (*) was interpreted as surrounding bold text, the signature highlighting on the title line is ok though:
  

Expected behavior
Something without misleading highlighting, even this:

[ranjithshegde]

@baco
is it fixed by #371?