Even though this is not directly about the formatting of the text, one often comes to ask about wrapping of text, when talking about general formatting. So I am going to mention it here, but I am explaining it in detail in the 'Tables' section, because that's where I need it the most.

white-space:normal;

Just your every-day normal behaviour.

white-space:no-wrap;

Spaces will not be used to wrap text at that point..

white-space:pre;

This value prevents the wrapping of text at a whitespace. Lines are only broken at newlines in the source, or at occurrences of "\A" in generated content.

white-space:pre-wrap;

This value prevents the wrapping at whitespaces. Lines are broken at newlines in the source, at occurrences of "\A" in generated content, and as necessary to fill line boxes.

white-space:pre-line;

This forces the wrapping at whitespaces. Lines are broken at newlines in the source, at occurrences of "\A" in generated content, and as necessary to fill line boxes.