rebase-interactive: suppress whitespace preceding item count

97f05f43 (Show number of TODO items for interactive rebase, 2014-12-10)
taught rebase-interactive to compute an item count with 'wc -l' and
display it in the instruction list comments:

    # Rebase 46640c6..5568fd5 onto 46640c6 (4 TODO item(s))

On Mac OS X, however, it renders as:

    # Rebase 46640c6..5568fd5 onto 46640c6 (       4 TODO item(s))

since 'wc -l' indents its output with leading spaces. Fix this.
Signed-off-by: NEric Sunshine <sunshine@sunshineco.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

git-rebase--interactive.sh

@@ -1032,6 +1032,7 @@ test -n "$autosquash" && rearrange_squash "$todo"
 test -n "$cmd" && add_exec_commands "$todo"
 
 todocount=$(git stripspace --strip-comments <"$todo" | wc -l)
+todocount=${todocount##* }
 
 cat >>"$todo" <<EOF
 

t/t3404-rebase-interactive.sh

@@ -1039,4 +1039,13 @@ test_expect_success 'short SHA-1 collide' '
 	)
 '
 
+test_expect_success 'todo count' '
+	write_script dump-raw.sh <<-\EOF &&
+		cat "$1"
+	EOF
+	test_set_editor "$(pwd)/dump-raw.sh" &&
+	git rebase -i HEAD~4 >actual &&
+	grep "^# Rebase ..* onto ..* ([0-9]" actual
+'
+
 test_done