Some HTML divs split over new line at class attribute

[rstmsn]

I'm not sure if this is in error, or is somehow controlable via the configuration, but when beautifying HTML, I am seeing inconsistent results.

Take the following example. My unbeautified code is as follows:

You can see that, for some reason, some of the opening div tags are split across multiple lines at the 'class' attribute definition. Other divs, however, do not get split across multiple lines.

Is this occuring in error or is there an explanation / configuration parameter that is responsible?