gistfile1.txt

    pattern = pattern.replace(/[.+?^=!:$()|[\]\\]/g, '\\$&');
    
    pattern = pattern.replace(/\{/g, '(?!=.*/)');
    pattern = pattern.replace(/\}/g, '');
    
    pattern = pattern.replace(/^(?!\/)/g, '//$&');
    
    pattern = pattern.replace(/\*+/g, '.*');
    
    pattern = pattern.replace(/\/{2,}(?=/{)/g, '/[\\s\\S]*');
    pattern = pattern.replace(/\/{1,}(?=/{)/g, '\\n');
        
    pattern = pattern.replace(/&sl;/g, '\\/');
    pattern = pattern.replace(/&st;/g, '\\*');
    pattern = pattern.replace(/&lc;/g, '\\{');
    pattern = pattern.replace(/&rc;/g, '\\}');
    
    return new RegExp(pattern);