Handle formatting ofTemplate andInterpolation types inpprint functions:

>>>from pprintimport pp>>> name="World">>> pp(t"Hello{World}")Template(strings=('Hello ', ''),         interpolations=(Interpolation('World', 'name', None, ''),))""")

Very straightforward, using existingPrettyPrinter helper methods.

To avoid slowing import time, I did not importTemplate andInterpolation fromstring.templatelib, but instead copied their (very simple) definition:

• Issue:Add support for Template type (t-strings) to pprint #134551