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, 6 insertions, 2 deletions

diff --git a/tests/stress/recursive_gen.py b/tests/stress/recursive_gen.py
index 0e0d3914ee..8c21397658 100644
--- a/tests/stress/recursive_gen.py
+++ b/tests/stress/recursive_gen.py
@@ -3,16 +3,20 @@
 # simple "yield from" recursion
 def gen():
     yield from gen()
+
+
 try:
     list(gen())
 except RuntimeError:
-    print('RuntimeError')
+    print("RuntimeError")
 
 # recursion via an iterator over a generator
 def gen2():
     for x in gen2():
         yield x
+
+
 try:
     next(gen2())
 except RuntimeError:
-    print('RuntimeError')
+    print("RuntimeError")