Space

While whitespace that is wedged in-between plain text and tags will persist, as in

Code-Blocks are only available within the browser

leading whitespace (i.e. indentation) as well as trailing whitespace gets removed unconditionally.

Code-Blocks are only available within the browser

If a single space is to be introduced at the end- or the beginning of a line, use the explicit Code-Blocks are only available within the browser tag.

Code-Blocks are only available within the browser

The Code-Blocks are only available within the browser tag acts as a mere placeholder and does not bear any content - it must be self-closing. Should the case ever arise that more than one space are to be inserted, consider using the Repeat Operator, as follows:

Code-Blocks are only available within the browser