Re-add implicit concat tests.

Author: davepeck

pep/__init__.py

@@ -20,7 +20,7 @@
 _MISSING_INTERLEAVING = False  # 🎉
 """True if the cpython prototype doesn't interleave strings and interpolations."""
 
-_MISSING_IMPLICIT_CONCAT = True
+_MISSING_IMPLICIT_CONCAT = False  # 🎉
 """True if the cpython prototype doesn't support implicit concatenatenation."""
 
 _INCORRECT_INIT_ARGS = False  # 🎉

pep/test.py

@@ -359,9 +359,6 @@ def test_template_constructor_interleaving_all_the_things():
     assert template.interpolations == (i1, i2, i3, i4)
 
 
-# TODO uncomment these when _MISSING_IMPLICIT_CONCAT is False
-
-# Implicit concat syntax is not supported whatsoever in the current PEP 750
 # def test_implicit_concat_str_template():
 #     template = "hello" t"world"
 #     assert isinstance(template, Template)