v3.4 adding extra and around form fields

After upgrading to v3.4 some content (a form) that was hand coded in the HTML input mode on a page is now being rendered with extra <br> and <p> tags between the form fields where they are not wanted.

I edited the code to remove all spaces in the form block of code and it is still rendering with these extra formatting tags.

Original code:
<form class="domain-check" action="https://clients.yoursiteourserver.com/domainchecker.php" method="post"><input type="hidden" name="token" value="14abebc9614ab37bd7152a4516229ea7c00a5479" /><input type="hidden" name="direct" value="true" /><input id="sld" type="text" name="domain" size="40" /><select name="ext"><option>.ca</option><option>.eu</option><option>.com</option><option>.org</option><option>.net</option><option>.us</option><option>.info</option><option>.name</option><option>.me</option><option>.mobi</option><option>.biz</option><option>.tv</option><option>.eu.com</option><option>.com.de</option><option>.asia</option><option>.in</option></select><input type="submit" value="Go" /></form>

Rendered to the browser:

<form class="domain-check" action="https://clients.yoursiteourserver.com/domainchecker.php" method="post"><input type="hidden" name="token" value="14abebc9614ab37bd7152a4516229ea7c00a5479" /><input type="hidden" name="direct" value="true" /><input id="sld" type="text" name="domain" size="40" /><br />
<select name="ext">
<option>.ca</option>
<option>.eu</option>
<option>.com</option>
<option>.org</option>
<option>.net</option>
<option>.us</option>
<option>.info</option>
<option>.name</option>
<option>.me</option>
<option>.mobi</option>
<option>.biz</option>
<option>.tv</option>
<option>.eu.com</option>
<option>.com.de</option>
<option>.asia</option>
<option>.in</option>
</select>
<p><input type="submit" value="Go" /></form>

How can I work around this while it is being fixed?