doc: surround `name?` with fancier characters

doc/release-notes/rl-1903.xml

@@ -23,8 +23,8 @@
   <itemizedlist>
    <listitem>
     <para>
-     The <option>home.file.&lt;name?&gt;.source</option> now allows source
-     files to be hidden, that is, having a name starting with the
+     The <option>home.file.‹name?›.source</option> now allows source files
+     to be hidden, that is, having a name starting with the
      <literal>.</literal> character. It also allows the source file name to
      contain characters not typically allowed for Nix store paths. For example,
      your configuration can now contain things such as

modules/misc/submodule-support.nix

@@ -25,7 +25,7 @@ with lib;
         installed separately from the Home Manager activation script.
         In NixOS, for example, this may be accomplished by installing
         the packages through
-        <option>users.users.&lt;name?&gt;.packages</option>.
+        <option>users.users.‹name?›.packages</option>.
       '';
     };
   };

nix-darwin/default.nix

@@ -25,7 +25,7 @@ in
     home-manager = {
       useUserPackages = mkEnableOption ''
         installation of user packages through the
-        <option>users.users.&lt;name?&gt;.packages</option> option.
+        <option>users.users.‹name?›.packages</option> option.
       '';
 
       users = mkOption {

nixos/default.nix

@@ -38,7 +38,7 @@ in
     home-manager = {
       useUserPackages = mkEnableOption ''
         installation of user packages through the
-        <option>users.users.&lt;name?&gt;.packages</option> option.
+        <option>users.users.‹name?›.packages</option> option.
       '';
 
       backupFileExtension = mkOption {