"lpeg" libraries. If <code>L</code> is a Lua 5.1 state, it
    must have also opened the "io" library.</p>

    <p>The LPeg lexer will create a single <code>lexer</code> package (that can
    be used with Lua's <code>require</code> function), as well as a number of
    other variables in the <code>LUA_REGISTRYINDEX</code> table with the "sci_"
    prefix.</p>

    <p>Rather than including the path to Scintilla's Lua lexers in the
    <code>package.path</code> of the given Lua state, set the "lexer.lpeg.home