@import url(http://fonts.googleapis.com/css?family=Open+Sans);

* {
  padding: 0;
  margin: 0;
}
body {
  font-family: "Open Sans", sans-serif;
  text-align: center;

}
textarea {
  resize: none;
  width: 800px;
  height: 400px;
}
input[type='submit'] {
  border: none;
  background-color: #2980b9;
  padding: 10px;
  border-radius: 4px;
  color: #fff;
}
#error {
  background-color: #e74c3c;
  border-radius: 4px;
  width: 50%;
  margin: 10px;
  color: #fff;
  margin: 0 auto;
}
#raw {
    white-space: pre-wrap;
    text-align: left;

}
#container{
  white-space: pre-wrap;
  width: 800px;
  height: 600px;
  border: 1px solid black;
  margin: 0 auto;
  margin: 10px auto;
  text-align: left;
  padding: 4px;
  overflow-y: scroll;
}

@import url(http://fonts.googleapis.com/css?family=Open+Sans);

* {
  padding: 0;
  margin: 0;
}
body {
  font-family: "Open Sans", sans-serif;
  text-align: center;

}
textarea {
  resize: none;
  width: 800px;
  height: 400px;
}
input[type='submit'] {
  border: none;
  background-color: #2980b9;
  padding: 10px;
  border-radius: 4px;
  color: #fff;
}
#error {
  background-color: #e74c3c;
  border-radius: 4px;
  width: 50%;
  margin: 10px;
  color: #fff;
  margin: 0 auto;
}
#raw {
    white-space: pre-wrap;
    text-align: left;
    font-family: monospace;

}
#container{
  white-space: pre-wrap;
  width: 800px;
  height: 600px;
  border: 1px solid black;
  margin: 0 auto;
  text-align: left;
  padding: 4px;
  overflow-y: scroll;
}

Change raw font to monospace.
Change raw font to monospace.
