Multi-line commits aren't actually formatted correctly, and most likely the
first line is enough of a summary anyway, so this change trims to the first
line. The commits are linked, so you can click through if you want more detail.
Fixes https://github.com/vector-im/riot-web/issues/8285
It's possible to get errors when fetching commits (for example, if the rate
limit is exceeded), so this will handle the error case and display it instead of
an infinite spinner.
Signed-off-by: J. Ryan Stinnett <jryans@gmail.com>
