Summary:
There is an existing template "diffstat" which gives a minimal and not
very useful output containing the overall number of files that changed, total
number of lines inserted for all associated files, and total number of lines
deleted for all associated files.
On the other hand, the output from the command line option "stat" is much more
descriptive. Therefore, users end up using commands of the form
hg log -r . -T '{author}{date}' --stat
When they would have preferred something like
hg log -r . -T '{author}{date}{stat}'
This change adds the template "stat" which will allow for the desired behavior.
Test Plan:
# Added a new test test-template-stat.t
# Ran arc unit
Reviewers: #sourcecontrol, quark
Reviewed By: quark
Subscribers: akushner, medson, mjpieters, quark, rmerizalde
Differential Revision: https://phabricator.intern.facebook.com/D5521665
Tasks: 12422741
Signature: t1:5521665:1501287682:2afaea56b3dc863c52e6300c6bc482ae132a6a61
