rename: add support for --at-rev, which marks as copy and removes the source I had previously only added support for `--at-rev` to `hg cp`, but not to `hg mv`. This patch adds that support. Just like for `hg cp`, it marks the destination as copied from the source, and doesn't care if the source file still exists (because it only supports the `-A` mode, aka "don't touch files" mode). It works whether or not the source file still exists. This matches the behavior of `hg mv -A` in the working copy. Differential Revision: https://phab.mercurial-scm.org/D8840

--- a/mercurial/commands.py	Fri Jul 24 15:03:14 2020 -0700
+++ b/mercurial/commands.py	Tue Jul 28 09:58:28 2020 -0700
@@ -5781,6 +5781,13 @@
     [
         (b'A', b'after', None, _(b'record a rename that has already occurred')),
         (
+            b'',
+            b'at-rev',
+            b'',
+            _(b'(un)mark renames in the given revision (EXPERIMENTAL)'),
+            _(b'REV'),
+        ),
+        (
             b'f',
             b'force',
             None,