Well it is very simple although i spent a lot of time on this but I got the solution which is very simple.
<%= (@object.details).gsub("\n","\
") %>
note:'do not use \ in your code that i used here \
, just simply use break tag'
what I was doing is
<%=h (@object.details).gsub("\n","\
") %>
the last line I mentioned here is using a <%=h which is generated by scaffold. So dont use this <%=h, simply use <%= and gsub method and it will work fine.
Note: using <%=h ... %> ensures that any HTML contained within would not render directly into the page, but instead convert <>
