n = document.selection.Replace( "<(.+)>", "@\1", eeReplaceSelOnly+eeFindReplaceRegExp);

if( document.selection.Find( "<(.+)>", eeFindReplaceRegExp | eeFindNext) ){
    x1 = document.selection.GetTopPointX( eePosLogical );
    y1 = document.selection.GetTopPointY( eePosLogical );
    x2 = document.selection.GetBottomPointX( eePosLogical );
    y2 = document.selection.GetBottomPointY( eePosLogical );

    sLine1 = document.GetLine( y2 );
    document.selection.Replace( "<(.+)>", "@\\1", eeFindReplaceRegExp);
    sLine2 = document.GetLine( y2 );
    x2 += sLine2.length - sLine1.length;
    
    document.selection.SetActivePoint( eePosLogical, x1, y1 );
    document.selection.SetActivePoint( eePosLogical, x2, y2, true );
} 

document.selection.StartOfDocument(false);
document.selection.Find("^\\s*?<L>.*?</L>",eeFindNext | eeFindSaveHistory | eeFindAround | eeFindReplaceRegExp);
document.selection.CharLeft(false,1);
document.selection.StartOfDocument(true);
document.selection.Delete(1);
document.selection.EndOfDocument(false);
document.selection.Find("<L>.*?</L>\\s*?$",eeFindPrevious | eeFindSaveHistory | eeFindAround | eeFindReplaceRegExp);
document.selection.CharRight(false,2);
document.selection.EndOfDocument(true);
document.selection.Delete(1);
document.selection.Replace("^\\s*?<L>(.*?)</L>\\s*?$","\\1",eeFindNext | eeFindSaveHistory | eeReplaceAll | eeFindReplaceRegExp);