neovim: Fix zls formatting hook

neovim/lua/plugins/ide.lua

@@ -12,9 +12,19 @@ vim.api.nvim_create_autocmd("LspAttach", {
     -- Usually not needed if server supports "textDocument/willSaveWaitUntil".
     already_waits = client:supports_method("textDocument/willSaveWaitUntil")
     can_fmt = client:supports_method("textDocument/formatting")
-    -- But tsserver/ts_ls seems to have no other way of disabling formatting.
-    deny_fmt = client.name == "ts_ls"
-    if not already_waits and can_fmt and not deny_fmt then
+
+    should_fmt = ({
+      -- tsserver/ts_ls seems to have no other way of disabling formatting.
+      ["ts_ls"] = false,
+      -- zls doesn't seem to trigger the normal way.
+      ["zls"] = true,
+    })[client.name]
+
+    if should_fmt == nil then
+      should_fmt = not already_waits and can_fmt
+    end
+
+    if should_fmt then
       vim.api.nvim_create_autocmd("BufWritePre", {
         group = vim.api.nvim_create_augroup("jdkaplan.lsp", { clear = false }),
         buffer = args.buf,