GoodBreak test
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> <mi>B</mi> <mo>-</mo> <mi>B</mi> <mo>-</mo> <mi>B</mi> <mo>-</mo> <mspace linebreak="goodbreak"/> <mi>a</mi> <mo>-</mo> <mi>a</mi> <mo>-</mo> <mi>a</mi> <mo>-</mo> <mi>a</mi> </math>
Author: Design Science, Inc. (D. Doyle, E. Cannon, E. Tabacman, R.Miner)