anchor.diff:          options.publicinboxmda.spamcheck = mkOption {
             type = with types; enum [ "spamc" "none" ];
             default = "none";
  -          description = ''
  -            If set to spamc, ${manref "public-inbox-watch" 1} will filter spam
  +          description = lib.mdDoc ''
  +            If set to spamc, {manpage}`public-inbox-watch(1)` will filter spam
               using SpamAssassin.
             '';
           };
           options.publicinboxwatch.spamcheck = mkOption {
             type = with types; enum [ "spamc" "none" ];
             default = "none";
  -          description = ''
  -            If set to spamc, ${manref "public-inbox-watch" 1} will filter spam
  +          description = lib.mdDoc ''
  +            If set to spamc, {manpage}`public-inbox-watch(1)` will filter spam
               using SpamAssassin.
             '';
           };
  
positive.code:         options.watch = mkOption {
            type = with types; listOf str;
            default = [];
            description = "Paths for ${manref "public-inbox-watch" 1} to monitor for new mail.";
            example = [ "maildir:/path/to/test.example.com.git" ];
          };
          options.watchheader = mkOption {
            type = with types; nullOr str;
            default = null;
            example = "List-Id:<test@example.com>";
            description = ''
              If specified, ${manref "public-inbox-watch" 1} will only process
              mail containing a matching header.
            '';
          };
  
negative.code:       type = with types; nullOr str;
        default = null;
        example = "/path/to/fullchain.pem";
        description = lib.mdDoc "Path to TLS certificate to use for connections to {manpage}`public-inbox-${proto}d(1)`.";
      };
      key = mkOption {
        type = with types; nullOr str;
        default = null;
        example = "/path/to/key.pem";
        description = lib.mdDoc "Path to TLS key to use for connections to {manpage}`public-inbox-${proto}d(1)`.";
      };
    };
  
  