When using a mutli-line quote, the interpreter must be on the first line, which doesn't look as nice.

Works:

sh """#!/bin/bash -xel
  set -o pipefail
  # Do stuff.
  """

Want:

sh """
  #!/bin/bash -xel
  set -o pipefail
  # Do stuff.
  """

(The latter will be passed to the default shell and ignored as a comment since it is on the second line.)