Add mapping for next ALE error

init.vim

@@ -188,6 +188,8 @@ nnoremap <C-e> 3<C-e>
 nnoremap <C-y> 3<C-y>
 " ctrl-r in visual mode to replace selected text
 vnoremap <C-r> "hy:%s/<C-r>h//g<left><left>
+
+nmap <leader>an :ALENext<cr>
 "}}}
 
 " P L U G I N S{{{