new_contents: from pgcli.packages.tabulate import tabulate
  from textwrap import dedent
  
  
  def test_dont_strip_leading_whitespace():
      data = [['    abc']]
      headers = ['xyz']
      tbl, _ = tabulate(data, headers, tablefmt='psql')
      assert tbl == dedent('''
          +---------+
          | xyz     |
          |---------|
          |     abc |
          +---------+ ''').strip()
  
subject: Add a test written by darikg. Not actually executed, please confirm it.