tests: Format all Python code with black, except tests in basics subdir.

This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/internal_bench/var-6-instance-attr.py b/tests/internal_bench/var-6-instance-attr.py
index 787ed870f..0124ef51b 100644
--- a/tests/internal_bench/var-6-instance-attr.py
+++ b/tests/internal_bench/var-6-instance-attr.py
@@ -1,14 +1,16 @@
 import bench
 
-class Foo:
 
+class Foo:
     def __init__(self):
         self.num = 20000000
 
+
 def test(num):
     o = Foo()
     i = 0
     while i < o.num:
         i += 1
 
+
 bench.run(test)