How to make full width?

Question

http://jsfiddle.net/bh2f6/1/

I want to make this

---

so it will stretch the full width, right to the edges of its parent container. I have tried add

Answer 1

Removing Padding should work for you

Working Example

.single-article .article-container-inner {
    background: #f0eded;
    border: 1px solid #c9c7c7;
    margin-bottom: 20px;
}
.single-article hr {
    margin-top: 30px;
    margin-bottom: 20px;
    border: 0;
    border-top: 1px solid #c9c7c7;
    width:100%
}