git-debrebase: renmae $old_upstream_update* to $old_anchor* (nfc)

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/git-debrebase b/git-debrebase
index 2dbfa90e4de218224b791709c63b53e3ff2e56df..dbbf51b4faba14f304d7ce503041d7e6bfcc25dd 100755 (executable)
--- a/git-debrebase
+++ b/git-debrebase
@@ -1064,13 +1064,13 @@ sub cmd_new_upstream_v0 () {
     # now we need to investigate the branch this generates the
     # laundered version but we don't switch to it yet
     my $old_head = get_head();
-    my ($old_laundered_tip,$old_bw,$old_upstream_update) = walk $old_head;
+    my ($old_laundered_tip,$old_bw,$old_anchor) = walk $old_head;
 
     my $old_bw_cl = classify $old_bw;
-    my $old_upstream_update_cl = classify $old_upstream_update;
-    confess unless $old_upstream_update_cl->{OrigParents};
+    my $old_anchor_cl = classify $old_anchor;
+    confess unless $old_anchor_cl->{OrigParents};
     my $old_upstream = parsecommit
-        $old_upstream_update_cl->{OrigParents}[0]{CommitId};
+        $old_anchor_cl->{OrigParents}[0]{CommitId};
 
     $piece->('', Old => $old_upstream->{CommitId});