Immerse Style Issue

Question

I am curious if anyone else has had this issue with any of the themes in SharePoint. I would really like to either expand what appears to be the "ms-comm-forumContainer" so it will look right or prevent text from being able to pop out of the container.
Ideally I would like to expand the "ms-comm-forumContainer" to a specific size and bound the display text so it cant pop out. Does anyone know if this is possible and how to do it or have any recommendations for this issue?

Answer 1

This looks like the opposite to the issue with default theme/composed look
discussion replies.
The replies inherit their width from the .ms-fullWidth class assigned to "<div class="ms-verticalAlignTop ms-tableCell ms-fullWidth">" under .ms-comm-postMainContainer. 
The long paragraphs are then trimmed horizontally to 690 pixels and the overflow is forcefully hidden, which is even worse, in my opinion. I hope Microsoft will address this in an upcoming update to on-premise SharePoint 2013 stylesheets.
It doesn't matter if the string is single word or not. The problem lies in the following CSS rules.
.ms-fullWidth
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
width:100%;
.ms-comm-forumContainer{
border-collapse:separate;
max-width:690px;
.ms-comm-postListItem{
display:block;
margin-
margin-bottom:0.7em;