leading text, tab-size in px.

	leading text, tab-size in em.

	leading text, tab-size in spaces.

	leading text, tab-size in fraction.

leading text	trailing text, tab-size in px.

leading text	trailing text, tab-size in em.

leading text	trailing text, tab-size in spaces.

leading text	trailing text, tab-size in fraction.

Some spaces... '         ' ... for size reference.

A space... ' ' ... for size reference.

'leading text', for size reference.