Fixed documentation typo

in the `Importing External Rules` section, where the `--allowed-start-rules` option was being remembered the was the command \* and not * as it should

docs/documentation.html

@@ -746,7 +746,7 @@ <h3 id="importing-external-rules">Importing External Rules</h3>
        grammar, NOT the source.  Grammars MUST be compiled by a version that
        supports imports in order to be imported.  Only rules that are allowed
        start rules are valid.  It can be useful to specify
-       <code>--allowed-start-rules \*</code> in library grammars.  Imports are
+       <code>--allowed-start-rules *</code> in library grammars.  Imports are
        only valid in output formats "es" and "commonjs".  If you
        use imports, you should use <code>{ output: "source" }</code>; the default
        output of "parser" will call `eval` on the source which fails immediately