" Allow variables to include dashes
set iskeyword+=-
set iskeyword+=$

inoremap <buffer> <expr> <Tab> (pumvisible() ? (col('.') > 1 ? '<Esc>i<Right>' : '<Esc>i') : '') .
            \ '<C-x><C-o><C-r>=pumvisible() ? "\<lt>C-n>\<lt>C-p>\<lt>Down>" : ""<CR>'
" open user completion menu closing previous if open and opening new menu without changing the text
inoremap  <buffer> <expr> <S-Tab> (pumvisible() ? (col('.') > 1 ? '<Esc>i<Right>' : '<Esc>i') : '') .
            \ '<C-x><C-u><C-r>=pumvisible() ? "\<lt>C-n>\<lt>C-p>\<lt>Down>" : ""<CR>'