Ramkumar Ramachandra wrote:

quoted text
> This rewrite makes section 0 less verbose and more readable. It is
> intended to be squashed into the previous commit.

Nice.

quoted text
> +To find the tip of a topic branch, run "git log --first-parent
> +master..pu" and look for the merge commit. The grandparent of this
> +commit is the tip of the topic branch.

The reader is not looking for the second-generation grand-parent foo~2
but the second parent foo^2, using terminology from git-rev-parse.1.

I guess the “second parent” term always involves this potential
confusion.  Luckily, the uninitiated reader can infer from the context
that foo~2 is not the intended commit, so there is no need to resort
to awkward phrases like “the second first-generation parent”.

Jonathan

diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index 0b62b62..8db22ef 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -79,7 +79,7 @@ change is relevant to.
    rebase your work.
 
 To find the tip of a topic branch, run "git log --first-parent
-master..pu" and look for the merge commit. The grandparent of this
+master..pu" and look for the merge commit. The second parent of this
 commit is the tip of the topic branch.
 
 (1) Make separate commits for logically separate changes.
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