MAINT: run black on files that ends up in a single line change.

If running black on a file change one line of less, let just make it
black Compliant

IPython/core/tests/print_argv.py

@@ -1,2 +1,3 b''
 import sys
+
 print(sys.argv[1:])

IPython/core/tests/test_autocall.py

@@ -8,6 +8,7 b" with better-isolated tests that don't rely on the global instance in iptest."
 from IPython.core.splitinput import LineInfo
 from IPython.core.prefilter import AutocallChecker
 
+
 def doctest_autocall():
     """
     In [1]: def f1(a,b,c):

IPython/core/tests/test_splitinput.py

@@ -32,6 +32,7 b' tests.append(("P\xc3\xa9rez Fernando", ("", "", "P\xc3\xa9rez", "Fernando")))'
 def test_split_user_input():
     return tt.check_pairs(split_user_input, tests)
 
+
 def test_LineInfo():
     """Simple test for LineInfo construction and str()"""
     linfo = LineInfo("  %cd /home")

IPython/lib/tests/test_clipboard.py

@@ -2,6 +2,7 b' from IPython.core.error import TryNext'
 from IPython.lib.clipboard import ClipboardEmpty
 from IPython.testing.decorators import skip_if_no_x11
 
+
 @skip_if_no_x11
 def test_clipboard_get():
     # Smoketest for clipboard access - we can't easily guarantee that the

IPython/utils/contexts.py

@@ -7,6 +7,7 b' import warnings'
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
+
 class preserve_keys(object):
     """Preserve a set of keys in a dictionary.
 

IPython/utils/eventful.py

@@ -1,4 +1,3 b''
-
 from warnings import warn
 
 warn("IPython.utils.eventful has moved to traitlets.eventful", stacklevel=2)

IPython/utils/log.py

@@ -1,4 +1,3 b''
-
 from warnings import warn
 
 warn("IPython.utils.log has moved to traitlets.log", stacklevel=2)

IPython/utils/tempdir.py

@@ -48,6 +48,7 b' class TemporaryWorkingDirectory(TemporaryDirectory):'
         with TemporaryWorkingDirectory() as tmpdir:
             ...
     """
+
     def __enter__(self):
         self.old_wd = Path.cwd()
         _os.chdir(self.name)