plugins/trouble: fix regressions introduced #213 (#215)

tests/plugins/trouble.nix

@@ -0,0 +1,56 @@
+{
+  # Empty configuration
+  empty = {
+    plugins.trouble.enable = true;
+  };
+
+  # All the upstream default options of trouble
+  defaults = {
+    plugins.trouble = {
+      enable = true;
+
+      position = "bottom";
+      height = 10;
+      width = 50;
+      icons = true;
+      mode = "workspace_diagnostics";
+      foldOpen = "";
+      foldClosed = "";
+      group = true;
+      padding = true;
+      actionKeys = {
+        close = "q";
+        cancel = "<esc>";
+        refresh = "r";
+        jump = ["<cr>" "<tab>"];
+        openSplit = ["<c-x>"];
+        openVsplit = ["<c-v>"];
+        openTab = ["<c-t>"];
+        jumpClose = ["o"];
+        toggleMode = "m";
+        togglePreview = "P";
+        hover = "K";
+        preview = "p";
+        closeFolds = ["zM" "zm"];
+        openFolds = ["zR" "zr"];
+        toggleFold = ["zA" "za"];
+        previous = "k";
+        next = "j";
+      };
+      indentLines = true;
+      autoOpen = false;
+      autoClose = false;
+      autoPreview = true;
+      autoFold = false;
+      autoJump = ["lsp_definitions"];
+      signs = {
+        error = "";
+        warning = "";
+        hint = "";
+        information = "";
+        other = "﫠";
+      };
+      useDiagnosticSigns = false;
+    };
+  };
+}