top: Update Python formatting to black "2023 stable style".

See https://black.readthedocs.io/en/stable/the_black_code_style/index.html

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

tests/unicode/unicode_id.py

@@ -10,6 +10,7 @@ bβ = 3
 βb = 4
 print(α, αβγ, bβ, βb)
 
+
 # function, argument, local identifiers
 def α(β, γ):
     δ = β + γ
@@ -18,6 +19,7 @@ def α(β, γ):
 
 α(1, 2)
 
+
 # class, method identifiers
 class φ:
     def __init__(self):