Code

For multiple lines of code, use the pre element:

Text in a pre element
      is displayed in a fixed-width
      font, and it preserves
      both      spaces and
      line breaks.

If you add the .pre-scrollable class, the pre element gets a max-height of 350px and provides a y-axis scrollbar:

Text in a pre element
      is displayed in a fixed-width
      font, and it preserves
      both      spaces and
      line breaks.