Template:Spacer/doc

This template is used to insert an invisible spacer element which ensures that the text that follows it cannot be squeezed into a too narrow width by floating page elements like pictures or navboxes. If the width of the page (or parent container or the text) gets too narrow, the invisible spacer element forces the text to appear below the floating element, rather than flowing around it.

Simply write  before the block of text that you want to protect.

You can also specify a custom spacer width like.