Bump pyupgrade target to 3.10+

... according to the versions currently supported.

Change-Id: I3fa7678d02a8e1437bc59259be0f2738857cf5ee
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

.pre-commit-config.yaml

@@ -26,4 +26,4 @@ repos:
     rev: v3.20.0
     hooks:
       - id: pyupgrade
-        args: [--py3-only]
+        args: [--py310-plus]

stevedore/example/load_as_extension.py

@@ -45,7 +45,7 @@ if __name__ == '__main__':
     results = mgr.map(format_data, data)
 
     for name, result in results:
-        print('Formatter: {}'.format(name))
+        print(f'Formatter: {name}')
         for chunk in result:
             print(chunk, end='')
         print('')

stevedore/sphinxext.py

@@ -33,7 +33,7 @@ def _simple_list(mgr):
         ext = mgr[name]
         doc = _get_docstring(ext.plugin) or '\n'
         summary = doc.splitlines()[0].strip()
-        yield ('* {} -- {}'.format(ext.name, summary),
+        yield (f'* {ext.name} -- {summary}',
                ext.module_name)
 
 
@@ -82,7 +82,7 @@ class ListPluginsDirective(rst.Directive):
         underline_style = self.options.get('underline-style', '=')
 
         def report_load_failure(mgr, ep, err):
-            LOG.warning('Failed to load {}: {}'.format(ep.module, err))
+            LOG.warning(f'Failed to load {ep.module}: {err}')
 
         mgr = extension.ExtensionManager(
             namespace,

stevedore/tests/test_sphinxext.py

@@ -25,7 +25,7 @@ def _make_ext(name, docstring):
 
     inner.__doc__ = docstring
     m1 = importlib_metadata.EntryPoint(
-        name, '{}_module:{}'.format(name, name), 'group',
+        name, f'{name}_module:{name}', 'group',
     )
     return extension.Extension(name, m1, inner, None)