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, 4 insertions, 1 deletions

diff --git a/tests/misc/sys_atexit.py b/tests/misc/sys_atexit.py
index f5317953c..e9c5693f9 100644
--- a/tests/misc/sys_atexit.py
+++ b/tests/misc/sys_atexit.py
@@ -1,17 +1,20 @@
 # test sys.atexit() function
 
 import sys
+
 try:
     sys.atexit
 except AttributeError:
-    print('SKIP')
+    print("SKIP")
     raise SystemExit
 
 some_var = None
 
+
 def do_at_exit():
     print("done at exit:", some_var)
 
+
 sys.atexit(do_at_exit)
 
 some_var = "ok"