Remove trailing nonsense.

This is related to the following issue: https://github.com/neoclide/coc.nvim/issues/5469

coc-settings.json

@@ -9,11 +9,6 @@
 			"command": "/sbin/texlab",
 			"filetypes": [ "tex","bib","plaintex","context" ]
 		},
-		"bash": {
-			"command": "bash-language-server",
-			"args": ["start"],
-			"filetypes": ["sh","bash"]
-        },
 		"golang": {
 			"command": "gopls",
 			"rootPatterns": ["go.mod"],

init.vim

@@ -30,7 +30,7 @@ filetype plugin on
 " indentation
 set tabstop=4                " tabs only count for 4 spaces
 set shiftwidth=4             " when indenting use 4 spaces
-set expandtab              " use tab characters
+set noexpandtab              " use tab characters
 set autoindent
 
 " view
@@ -52,23 +52,28 @@ set foldmethod=syntax
 set scrolloff=7
 
 " CoC settings
+function! CheckBackspace() abort
+	let col = col('.') - 1
+	return !col || getline('.')[col - 1]  =~# '\s'
+endfunction
+
 inoremap <silent><expr> <TAB>
-      \ coc#pum#visible() ? coc#pum#next(1) :
-      \ CheckBackspace() ? "\<Tab>" :
-      \ coc#refresh()
-inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"
-"inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
-"inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
-nmap <C-a> :CocAction<CR>
+	  \ coc#pum#visible() ? coc#pum#next(1) :
+	  \ CheckBackspace() ? "\<Tab>" :
+	  \ coc#expandableOrJumpable() ? "\<C-r>=coc#snippet#next()\<CR>" :
+	  \ coc#refresh()
+inoremap <silent><expr> <S-TAB>
+	  \ coc#pum#visible() ? coc#pum#prev(1) :
+	  \ CheckBackspace() ? "\<S-Tab>" :
+	  \ coc#expandableOrJumpable() ? "\<C-r>=coc#snippet#prev()\<CR>" :
+	  \ coc#refresh()
 let g:coc_disable_startup_warning = 1
 
 inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
                               \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
 
-function! CheckBackspace() abort
-	let col = col('.') - 1
-	return !col || getline('.')[col - 1]  =~# '\s'
-endfunction
+let g:coc_snippet_next = '<Tab>'
+let g:coc_snippet_prev = '<S-Tab>'
 
 func! s:my_colors_setup() abort
 	" this is an example
@@ -85,6 +90,15 @@ nmap <silent> [g <Plug>(coc-diagnostic-prev)
 nmap <silent> ]g <Plug>(coc-diagnostic-next)
 nmap <silent> ]f <Plug>(coc-fix-current)
 
+" Symbol renaming
+nmap <leader>rn <Plug>(coc-rename)
+
+" GoTo code navigation
+nmap <silent><nowait> gd <Plug>(coc-definition)
+nmap <silent><nowait> gy <Plug>(coc-type-definition)
+nmap <silent><nowait> gi <Plug>(coc-implementation)
+nmap <silent><nowait> gr <Plug>(coc-references)
+
 " syntax highlighting
 syntax on
 set background=dark