Merge branch 'jk/committer-date-is-author-date-fix' into maint

In 2.29, "--committer-date-is-author-date" option of "rebase" and
"am" subcommands lost the e-mail address by mistake, which has been
corrected.

* jk/committer-date-is-author-date-fix:
  rebase: fix broken email with --committer-date-is-author-date
  am: fix broken email with --committer-date-is-author-date
  t3436: check --committer-date-is-author-date result more carefully

builtin/am.c

@@ -161,7 +161,7 @@ static void am_state_init(struct am_state *state)
 	state->committer_name =
 		xmemdupz(id.name_begin, id.name_end - id.name_begin);
 	state->committer_email =
-		xmemdupz(id.mail_begin, id.mail_end - id.mail_end);
+		xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);
 }
 
 /**
@@ -1595,7 +1595,7 @@ static void do_commit(const struct am_state *state)
 
 	if (state->committer_date_is_author_date)
 		committer = fmt_ident(state->committer_name,
-				      state->author_email, WANT_COMMITTER_IDENT,
+				      state->committer_email, WANT_COMMITTER_IDENT,
 				      state->ignore_date ? NULL
 							 : state->author_date,
 				      IDENT_STRICT);

sequencer.c

@@ -4478,7 +4478,7 @@ static int init_committer(struct replay_opts *opts)
 	opts->committer_name =
 		xmemdupz(id.name_begin, id.name_end - id.name_begin);
 	opts->committer_email =
-		xmemdupz(id.mail_begin, id.mail_end - id.mail_end);
+		xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);
 
 	return 0;
 }

t/t3436-rebase-more-options.sh

@@ -65,8 +65,8 @@ test_expect_success '--ignore-whitespace is remembered when continuing' '
 '
 
 test_ctime_is_atime () {
-	git log $1 --format=%ai >authortime &&
-	git log $1 --format=%ci >committertime &&
+	git log $1 --format="$GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> %ai" >authortime &&
+	git log $1 --format="%cn <%ce> %ci" >committertime &&
 	test_cmp authortime committertime
 }