[PATCH 0/2] Eliminate extraneous ref log entries

Since Git version v2.29.0, the `git symbolic-ref` command has started
adding extraneous entries to the ref log of the symbolic ref it's
updating.

This change was inadvertently introduced in commit 523fa69c36744ae6
("reflog: cleanse messages in the refs.c layer", 2020-07-10, v2.29.0).

A bug report [1] was made about a failing test in the TopGit test
suite.  Further investigations into the cause led to this patch set.

1/2 - adds new tests to monitor this behavior
2/2 - corrects the problem

The tests added in 1/2 are marked `test_expect_failure` and then
changed to `test_expect_success` in 2/2.

-Kyle

[1]: <https://github.com/mackyle/topgit/issues/17>

Kyle J. McKay (2):
  t/t1417: test symbolic-ref effects on ref logs
  refs.c: avoid creating extra unwanted reflog entries

 refs.c                   | 16 +++----
 t/t1417-reflog-symref.sh | 91 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 100 insertions(+), 7 deletions(-)
 create mode 100755 t/t1417-reflog-symref.sh

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