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.

tests/io/argv.py

@@ -1,2 +1,3 @@
 import sys
+
 print(sys.argv)

tests/io/builtin_print_file.py

@@ -5,13 +5,13 @@ import sys
 try:
     sys.stdout
 except AttributeError:
-    print('SKIP')
+    print("SKIP")
     raise SystemExit
 
 print(file=sys.stdout)
-print('test', file=sys.stdout)
+print("test", file=sys.stdout)
 
 try:
     print(file=1)
-except (AttributeError, OSError): # CPython and uPy differ in error message
-    print('Error')
+except (AttributeError, OSError):  # CPython and uPy differ in error message
+    print("Error")

tests/io/file1.py

@@ -4,43 +4,43 @@ print(f.readline())
 print(f.read())
 f = open("io/data/file1")
 print(f.readlines())
-f = open("io/data/file1","r")
+f = open("io/data/file1", "r")
 print(f.readlines())
-f = open("io/data/file1","rb")
+f = open("io/data/file1", "rb")
 print(f.readlines())
-f = open("io/data/file1",mode="r")
+f = open("io/data/file1", mode="r")
 print(f.readlines())
-f = open("io/data/file1",mode="rb")
+f = open("io/data/file1", mode="rb")
 print(f.readlines())
 
 # write() error
-f = open('io/data/file1', 'r')
+f = open("io/data/file1", "r")
 try:
-    f.write('x')
+    f.write("x")
 except OSError:
-    print('OSError')
+    print("OSError")
 f.close()
 
 # read(n) error on binary file
-f = open('io/data/file1', 'ab')
+f = open("io/data/file1", "ab")
 try:
     f.read(1)
 except OSError:
-    print('OSError')
+    print("OSError")
 f.close()
 
 # read(n) error on text file
-f = open('io/data/file1', 'at')
+f = open("io/data/file1", "at")
 try:
     f.read(1)
 except OSError:
-    print('OSError')
+    print("OSError")
 f.close()
 
 # read() w/o args error
-f = open('io/data/file1', 'ab')
+f = open("io/data/file1", "ab")
 try:
     f.read()
 except OSError:
-    print('OSError')
+    print("OSError")
 f.close()

tests/io/file_readinto.py

@@ -7,8 +7,8 @@ print(f.readinto(b))
 print(b)
 
 # readinto() on writable file
-f = open('io/data/file1', 'ab')
+f = open("io/data/file1", "ab")
 try:
     f.readinto(bytearray(4))
 except OSError:
-    print('OSError')
+    print("OSError")

tests/io/file_readline.py

@@ -6,9 +6,9 @@ print(f.readline(5))
 print(f.readline())
 
 # readline() on writable file
-f = open('io/data/file1', 'ab')
+f = open("io/data/file1", "ab")
 try:
     f.readline()
 except OSError:
-    print('OSError')
+    print("OSError")
 f.close()

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")

tests/io/file_with.py

@@ -15,7 +15,7 @@ except:
 # Regression test: test that exception in with initialization properly
 # thrown and doesn't crash.
 try:
-    with open('__non_existent', 'r'):
+    with open("__non_existent", "r"):
         pass
 except OSError:
     print("OSError")

tests/io/resource_stream.py

@@ -4,7 +4,7 @@ import sys
 try:
     uio.resource_stream
 except AttributeError:
-    print('SKIP')
+    print("SKIP")
     raise SystemExit
 
 buf = uio.resource_stream("data", "file2")