If a commit message has the style
""" this is the first line
here is a longer explanation, after a blank line spanning several lines blah blah... """
the author cleanly intended the first line to be a summary and the rest a longer explanation. the "recent activity" list disregards the blank, starts reading the long explanation and truncates after a certain length.
The recent activity would have a better aspect if only the lines before the blank were retained: first truncate the message to the first \n\n, then apply the chars limit.
An example is again at https://bitbucket.org/dvarrazzo/psycogreen