code: function wrapLinesWithCode(str, css)
      {
          if (str == null || str.length == 0 || str == '\n')
              return str;
  
          str = str.replace(/</g, '&lt;');
  
          // Replace two or more sequential spaces with &nbsp; leaving last space untouched.
          str = str.replace(/ {2,}/g, function(m)
          {
              var spaces = '';
  
              for (var i = 0; i < m.length - 1; i++)
                  spaces += sh.config.space;
  
              return spaces + ' ';
          });
  
          // Split each line and apply <span class="...">...</span> to them so that
          // leading spaces aren't included.
          if (css != null)
              str = eachLine(str, function(line)
              {
                  if (line.length == 0)
                      return '';
  
                  var spaces = '';
  
                  line = line.replace(/^(&nbsp;| )+/, function(s)
                  {
                      spaces = s;
                      return '';
                  });
  
                  if (line.length == 0)
                      return spaces;
  
                  return spaces + '<code class="' + css + '">' + line + '</code>';
              });
  
          return str;
      }
docs: Wraps each line of the string into <code/> tag with given style applied to it.
  
  @param {String} str   Input string.
  @param {String} css   Style name to apply to the string.
  @return {String}      Returns input string with each line surrounded by <span/> tag.