tests/test-dispatch.py.out

templatekw: copy {author} to {user} and document {author} as an alias

In other places including "log -Tjson" and revset, "user" is the canonical
name. Let's standardize it.

This is a part of the name unification of the Generic Templating Plan.
https://www.mercurial-scm.org/wiki/GenericTemplatingPlan#Dictionary

running: init test1
result: 0
running: add foo
result: 0
running: commit -m commit1 -d 2000-01-01 foo
result: 0
running: commit -m commit2 -d 2000-01-02 foo
result: 0
running: log -r 0
changeset:   0:0e4634943879
user:        test
date:        Sat Jan 01 00:00:00 2000 +0000
summary:     commit1

result: 0
running: log -r tip
changeset:   1:45589e459b2e
tag:         tip
user:        test
date:        Sun Jan 02 00:00:00 2000 +0000
summary:     commit2

result: 0