For files with lots of dependencies (i.e. libxul), printing out the
entire list of changed files can be tedious. Instead, let's pick some
reasonable limit for the number of files we'll explicitly show, and
indicate that there are more files (but not print them out) for cases
that exceed that limit.
Differential Revision: https://phabricator.services.mozilla.com/D51913
--HG--
extra : moz-landing-system : lando
