Merge pull request #220481 from uoleg/master

nixos/nano: refactor nanorc creation

nixos/modules/programs/nano.nix

@@ -35,8 +35,17 @@ in
   ###### implementation
 
   config = lib.mkIf (cfg.nanorc != "" || cfg.syntaxHighlight) {
-    environment.etc.nanorc.text = lib.concatStrings [ cfg.nanorc
-      (lib.optionalString cfg.syntaxHighlight ''${LF}include "${pkgs.nano}/share/nano/*.nanorc"'') ];
+    environment.etc.nanorc.text = lib.concatStringsSep LF (
+      ( lib.optionals cfg.syntaxHighlight [
+          "# The line below is added because value of programs.nano.syntaxHighlight is set to true"
+          ''include "${pkgs.nano}/share/nano/*.nanorc"''
+          ""
+      ])
+      ++ ( lib.optionals (cfg.nanorc != "") [
+        "# The lines below have been set from value of programs.nano.nanorc"
+        cfg.nanorc
+      ])
+    );
   };
 
 }