Fix whitespace problem with pre tags containing brs

[ghost]

Consider this HTML:

<pre>
    <span>
void FillMeUp(char* in_string) {<br />  int i = 0;<br />  while (in_string[i] != \'\0\') {<br />    in_string[i] = \'X\';<br />    i++;<br />  }<br />}
    </span>
</pre>

In version 3 it was rendered like this:

void FillMeUp(char* in_string) {
  int i = 0;
  while (in_string[i] != \'\') {
    in_string[i] = \'X\';
    i++;
  }
}

But now in version 4 we get this:

void FillMeUp(char* in_string) {
int i = 0;
while (in_string[i] != \'\') {
in_string[i] = \'X\';
i++;
}
}

As best I can tell this has something to do with the changes to the callbackSearch array - specifically the
addition.

[mtibben]

@cameron1729 can you update the description with full details of the problem with examples? It's nice to have a clear record of changes like this in PRs.

[mtibben]

Ah right I found the description in #60

[ghost]

Thanks for being so prompt with all these fixes 👍 :]