improve key mappings a bit and add spellcheck

init.lua

@@ -26,15 +26,12 @@ vim.opt.pastetoggle = '<F2>'
 vim.opt.shiftwidth = 4
 vim.opt.softtabstop = 4
 vim.opt.tabstop = 4
-vim.opt.textwidth = 125
+vim.opt.textwidth = 79
 vim.opt.undofile = true
 -- Enable vimrc files per project and disable unsafe commands in project vimrc
 vim.opt.exrc = true
 vim.opt.secure = true
 
-vim.cmd 'noremap <tab> :bn<CR>'
-vim.cmd 'noremap <S-tab> :bp<CR>'
-
 -- Toggles on different plugins/modes
 vim.cmd 'nmap <F3> :set nonumber!<CR>'
 vim.cmd 'nmap <F5> :NvimTreeToggle<CR>'
@@ -54,13 +51,22 @@ vim.cmd 'highlight Pmenu ctermbg=253 guibg=253'
 vim.cmd 'highlight Pmenu ctermfg=232 guifg=232'
 vim.cmd 'let g:airline_theme=\'papercolor\''
 
--- Find files using Telescope command-line sugar.
-vim.cmd 'nnoremap <leader>ff <cmd>Telescope find_files<cr>'
-vim.cmd 'nnoremap <leader>fg <cmd>Telescope live_grep<cr>'
-vim.cmd 'nnoremap <leader>fb <cmd>Telescope buffers<cr>'
-vim.cmd 'nnoremap <leader>fh <cmd>Telescope help_tags<cr>'
-vim.cmd 'nnoremap <leader>fl <cmd>Telescope git_files<cr>'
+local keymap = vim.api.nvim_set_keymap
+local default_opts = { noremap = true, silent = true }
 
+-- Use tab and shift+tab to cycle buffers
+keymap("n", "<tab>", "<cmd>bn<cr>", default_opts)
+keymap("n", "<S-tab>", "<cmd>bp<cr>", default_opts)
+
+-- Find files, buffers, grep in folder using Telescope command-line sugar.
+keymap("n", "<leader>ff", "<cmd>Telescope find_files<cr>", default_opts)
+keymap("n", "<leader>fg", "<cmd>Telescope live_grep<cr>", default_opts)
+keymap("n", "<leader>fb", "<cmd>Telescope buffers<cr>", default_opts)
+keymap("n", "<leader>fh", "<cmd>Telescope help_tags<cr>", default_opts)
+keymap("n", "<leader>fl", "<cmd>Telescope git_files<cr>", default_opts)
+
+-- Turn spellchecker on
+keymap("n", "<leader>s", "<cmd>setlocal spell spelllang=en_us<cr>", default_opts)
 
 -- Install plugins
 require('plugins')