MAINT: Use f-strings in test_import_nesting.py (mne-tools#13551)

Author: shruti423

doc/changes/dev/13551.other.rst

@@ -0,0 +1 @@
+Refactor f-strings in ``mne/tests/test_import_nesting.py``, by :newcontrib:`Shruti Bhale`.

doc/changes/names.inc

@@ -302,6 +302,7 @@
 .. _Sheraz Khan: https://github.com/SherazKhan
 .. _Shresth Keshari: https://github.com/shresth-keshari
 .. _Shristi Baral: https://github.com/shristibaral
+.. _Shruti Bhale: https://github.com/shruti423
 .. _Silvia Cotroneo: https://github.com/sfc-neuro
 .. _Simeon Wong: https://github.com/dtxe
 .. _Simon Kern: https://skjerns.de

mne/tests/test_import_nesting.py

@@ -242,7 +242,7 @@ def generic_visit(self, node):
                        and sys.modules[x] is not None)
 bad = scipy_submodules - ok_scipy_submodules
 if len(bad) > 0:
-    out |= {'scipy submodules: %s' % list(bad)}
+    out |= {f'scipy submodules: {list(bad)}'}
 
 # check sklearn and others
 for x in sys.modules.keys():
@@ -253,7 +253,7 @@ def generic_visit(self, node):
             x = '.'.join(x.split('.')[:2])
             out |= {x}
 if len(out) > 0:
-    print('\\nFound un-nested import(s) for %s' % (sorted(out),), end='')
+    print(f'\\nFound un-nested import(s) for {sorted(out)}', end='')
 exit(len(out))
 
 # but this should still work