nvim: fix error relating to lua lsp loading

.config/nvim/lua/blake/lsp.lua

@@ -212,7 +212,7 @@ M.lspconfig = function()
       bashls         = 'bash-language-server',
    }
    for lsp, exe in pairs(lsp_servers) do
-      if (vim.fn.executable(exe) == 1) then
+      if (vim.fn.executable(exe) == true) then
          nvim_lsp[lsp].setup {
             on_attach = on_attach,
             flags = {
@@ -223,7 +223,6 @@ M.lspconfig = function()
    end
    -- Custom servers >>>
    -- lua >>>
-   -- From kickstart.nvim:
    local sumneko_root_path
    local sumneko_binary
    if (vim.fn.exepath('lua-language-server') ~= '') then
@@ -236,6 +235,8 @@ M.lspconfig = function()
       sumneko_binary = sumneko_root_path .. '/lua-language-server'
    end
 
+   -- From kickstart.nvim:
+   if (vim.fn.executable(sumneko_binary) == true) then
       -- Make runtime files discoverable to the server
       local runtime_path = vim.split(package.path, ';')
       table.insert(runtime_path, 'lua/?.lua')
@@ -268,6 +269,7 @@ M.lspconfig = function()
             },
          },
       }
+   end
    -- lua <<<
    -- Custom servers <<<
    -- Load servers <<<