Horizontal scrollbar appeared on 100% width layout

Created by: shahariaazam

I have tried to make my layout 100%. And for that I didn't use any <div class ="container">. Just started with <div class ="row">.

<div class="row">
    <div class="col-md-3">
        <div class="sectionLeft">
            Sidebar Content
        </div>
    </div>
    <div class="col-md-9">
        Test content
    </div>
</div>

but it showing horizontal scroll bar. I don't know why. But I saw that it may cause from margin-left and margin-right negative value. But I am using Bootstrap v3.0.0 it should be fixed.

Please see my full code from http://bootply.com/81888