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, 2 insertions, 2 deletions

diff --git a/tests/io/file_seek.py b/tests/io/file_seek.py
index 10fb1fd06..2fe57692c 100644
--- a/tests/io/file_seek.py
+++ b/tests/io/file_seek.py
@@ -25,10 +25,10 @@ print(f.tell())
 f.close()
 
 # seek closed file
-f = open('io/data/file1', 'r')
+f = open("io/data/file1", "r")
 f.close()
 try:
     f.seek(1)
 except (OSError, ValueError):
     # CPy raises ValueError, uPy raises OSError
-    print('OSError or ValueError')
+    print("OSError or ValueError")