Display text characters including code, blank spaces, and line-breaks in a pre-formatted fashion on your Drupal 7 site

[Please insert answer here. (*) CSS and HTML code editing instructions welcome. JavaScript and/or PHP code instructions are welcomed if my quest is Not possible strictly using HTML/CSS]

This page is intended as a consolidation of this issue as being discussed is at the drupal.org forum page http://drupal.org/node/1505188