Make <c-w><c-]> work with vim-erlang-tags

gistfile1.txt

function! VimErlangTagsSelectSplit()
    split
    let orig_isk = &isk
    set isk+=:
    normal "_vawo
    if getline('.')[col('.') - 2] =~# '[#?]'
        normal h
    endif
    let &isk = orig_isk
endfunction

function! VimErlangTagsDefineMappings()
    nnoremap <buffer> <c-]>         :call VimErlangTagsSelect()<cr><c-]>
    nnoremap <buffer> g<LeftMouse>  :call VimErlangTagsSelect()<cr>g<LeftMouse>
    nnoremap <buffer> <c-LeftMouse> :call VimErlangTagsSelect()<cr><c-LeftMouse>
    nnoremap <buffer> g]            :call VimErlangTagsSelect()<cr>g]
    nnoremap <buffer> g<c-]>        :call VimErlangTagsSelect()<cr>g<c-]>
    nnoremap <buffer> <c-w><c-]>    :call VimErlangTagsSelectSplit()<cr><c-]>
    nnoremap <buffer> <c-w>]        :call VimErlangTagsSelectSplit()<cr><c-]>
endfunction