NOTE: If you installing above HotFix, it is advisable to install this one too - http://support.microsoft.com/kb/2625302 and http://support.microsoft.com/kb/2673532. In fact, read about the latter one (http://support.microsoft.com/kb/2673532) and you can directly install this which will get you everything.
We have added multiline support in test steps in Microsoft Test Manager (MTM). The multiline support in test steps have been one of the top asks in UserVoice on MTM. Refer Brian’s blog on more details including how to get this update.
Apart from multiline support, the update also contains couple of other improvements in test steps control. It has -