addressing linting issues

IPython/core/magic.py

@@ -618,7 +618,7 b' class Magics(Configurable):'
         posix = kw.get('posix', os.name == 'posix')
         strict = kw.get('strict', True)
 
-        preserve_non_opts = kw.get('preserve_non_opts', False)
+        preserve_non_opts = kw.get("preserve_non_opts", False)
         remainder_arg_str = arg_str
         
         # Check if we have more than one argument to warrant extra processing:
@@ -632,15 +632,18 b' class Magics(Configurable):'
             try:
                 opts,args = getopt(argv, opt_str, long_opts)
             except GetoptError as e:
-                raise UsageError('%s ( allowed: "%s" %s)' % (e.msg,opt_str,
-                                                             " ".join(long_opts))) from e
+                raise UsageError(
+                    '%s ( allowed: "%s" %s)' % (e.msg, opt_str, " ".join(long_opts))
+                ) from e
             for o,a in opts:
-                if mode is 'string' and preserve_non_opts:
+                if mode is "string" and preserve_non_opts:
                     # remove option-parts from the original args-string and preserve remaining-part.
                     # This relies on the arg_split(...) and getopt(...)'s impl spec, that the parsed options are 
                     # returned in the original order. 
-                    remainder_arg_str = remainder_arg_str.replace(o, '', 1).replace(a, '', 1)
-                if o.startswith('--'):
+                    remainder_arg_str = remainder_arg_str.replace(o, "", 1).replace(
+                        a, "", 1
+                    )
+                if o.startswith("--"):
                     o = o[2:]
                 else:
                     o = o[1:]

IPython/core/magics/execution.py

@@ -1073,8 +1073,9 b' class ExecutionMagics(Magics):'
         does not matter as long as results from timeit.py are not mixed with
         those from %timeit."""
 
-        opts, stmt = self.parse_options(line, 'n:r:tcp:qo',
-                                        posix=False, strict=False, preserve_non_opts=True)
+        opts, stmt = self.parse_options(
+            line, "n:r:tcp:qo", posix=False, strict=False, preserve_non_opts=True
+        )
         if stmt == "" and cell is None:
             return
         

IPython/core/tests/test_magic.py

@@ -473,16 +473,18 b' def test_parse_options():'
 def test_parse_options_preserve_non_option_string():
     """Test to assert preservation of non-option part of magic-block, while parsing magic options."""
     m = DummyMagics(_ip)
-    opts, stmt = m.parse_options(' -n1  -r 13 _ = 314 + foo', 'n:r:', preserve_non_opts= True)
-    nt.assert_equal(opts, {'n': '1', 'r': '13'})
-    nt.assert_equal(stmt, '_ = 314 + foo')
+    opts, stmt = m.parse_options(
+        " -n1  -r 13 _ = 314 + foo", "n:r:", preserve_non_opts=True
+    )
+    nt.assert_equal(opts, {"n": "1", "r": "13"})
+    nt.assert_equal(stmt, "_ = 314 + foo")
 
 
 def test_run_magic_preserve_code_block():
     """Test to assert preservation of non-option part of magic-block, while running magic."""
-    _ip.user_ns['spaces'] = []
+    _ip.user_ns["spaces"] = []
     _ip.magic("timeit -n1 -r1 spaces.append([s.count(' ') for s in ['document']])")
-    assert _ip.user_ns['spaces'] == [[0]]
+    assert _ip.user_ns["spaces"] == [[0]]
     
 
 def test_dirops():