code: function(walk) {
      return this.tryBracing(walk, '`', '`', function(w) {
        this.out.push("<code>");
        while (w.hasCurrent())
          this.emitCode(w);
        this.out.push("</code>");
      });
    }
docs: /* Regular code spans are processed by escaping amps, lt-gts, resolving
  fragments and respecting backslash escapes.