plugins/jdtls: allow rawLua in settings.cmd

plugins/by-name/jdtls/settings-options.nix

@@ -5,7 +5,7 @@ let
 in
 {
   cmd = mkNullOrOption' {
-    type = with types; listOf str;
+    type = with types; listOf (maybeRaw str);
     example = [
       "java"
       "-data"

tests/test-sources/plugins/by-name/jdtls/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ lib, pkgs, ... }:
 {
   example = {
     plugins.jdtls = {
@@ -40,4 +40,17 @@
       ];
     };
   };
+
+  rawStringInCmd = {
+    plugins.jdtls = {
+      enable = true;
+
+      settings = {
+        cmd = [
+          (lib.getExe pkgs.jdt-language-server)
+          { __raw = "'--jvm-arg='..vim.api.nvim_eval('g:NVIM_LOMBOK')"; }
+        ];
+      };
+    };
+  };
 }