BizForm validator messages are rendered in a span with class=”EditingFormErrorLabel” and style=”display: block”
This forces them to display on a separate line, even if you specify a layout of
<td>$$input:Company_Name$$ $$validation:Company_Name$$</td>

Thanks to Jurag for pointing out how to get the validation message to appear to the right of the input. You can override the block display with an important! keyword in the CSS
.EditingFormErrorLabel
{
display: inline !important;
}