backslash escapes shown in coc-json doHover float

[RedBeard0531]

Not sure if this is an issue with coc or coc-json. Not even sure if it is just with doHover but that is where I noticed it.

[chemzqm]

Can't reproduce with minimal vimrc.

[Congee]

Actually see it a lot

[Dreomite]

@chemzqm In my case, vim-polyglot was the problem.

NVIM v0.4.3
Minimal .vimrc:

call plug#begin('~/.local/share/nvim/plugged')
Plug 'sheerun/vim-polyglot'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
call plug#end()

" LSPs I have. Both are broken.
let g:coc_global_extensions = ['coc-json', 'coc-omnisharp']

nnoremap <silent> K :call <SID>show_documentation()<CR>
function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction

EDIT
Well, seems like I still get backslashes, but rarely. With vim-polyglot on, it escapes all the colored characters (like in the OP's screenshot). With vim-polyglot off, it escapes characters selectively:

When I'll have time, I'll try to play with my config to triage the source of the issue.
It still persists when using vimrc I posted above (without vim-polyglot) and empty coc-settings.json.

[flw-cn]

@RedBeard0531 You can try Plug “flw-cn/vim-markdown” which is a fork for plasticboy/vim-markdown and it automatically hides the backslash. see PR preservim/vim-markdown#515 to see exactly what it does.