issue with this plugin and neosnippet

[wsdjeg]

mini vimrc

set rtp+=~/.cache/vimfiles/repos/github.com/Shougo/neosnippet.vim
set rtp+=~/.cache/vimfiles/repos/github.com/Shougo/neosnippet-snippets
set rtp+=~/.cache/vimfiles/repos/github.com/Shougo/deoplete.nvim
set rtp+=~/.cache/vimfiles/repos/github.com/tweekmonster/deoplete-clang2
let g:deoplete#enable_at_startup = get(g:, 'deoplete#enable_at_startup', 1)

imap <expr><Tab>
            \ neosnippet#expandable_or_jumpable() ?
            \ "\<Plug>(neosnippet_expand_or_jump)" : "\<Tab>"

reproduce step:

1. open vim via vim -u test.vim
2. :e test.c
3. type i to insert mode, then type into main<tab>

you will see

main<Plug>(neosnippet_expand_or_jump)

but I think it should be

int main(int argc, char const* argv[])
{
    
    return 0;
}

ref : wsdjeg/SpaceVim#356

[Shougo]

deoplete-clang2 overwrites <Tab> mapping.
It seems the mapping conflict.